Home / 78,528,084.30-117,792,126.45-30,659,028.30

Finding the Fourth Proportional to 78,528,084.30, 117,792,126.45 and 30,659,028.30

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Solution

The fourth proportional to 78,528,084.30, 117,792,126.45 and 30,659,028.30 is: 45,988,542.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,528,084.30 : 117,792,126.45 = 30,659,028.30 : x
  2. Step 2: Convert to fraction form
    78,528,084.30/117,792,126.45 = 30,659,028.30/x
  3. Step 3: Cross multiply
    78,528,084.30x = 117,792,126.45 × 30,659,028.30
  4. Step 4: Simplify right side
    78,528,084.30x = 3,611,392,138,347,728.50
  5. Step 5: Solve for x
    x = 3,611,392,138,347,728.50/78,528,084.30
  6. Step 6: Final answer
    x = 45,988,542.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.