Home / 78,528,077.30-117,792,115.95-30,659,021.30

Finding the Fourth Proportional to 78,528,077.30, 117,792,115.95 and 30,659,021.30

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Solution

The fourth proportional to 78,528,077.30, 117,792,115.95 and 30,659,021.30 is: 45,988,531.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,528,077.30 : 117,792,115.95 = 30,659,021.30 : x
  2. Step 2: Convert to fraction form
    78,528,077.30/117,792,115.95 = 30,659,021.30/x
  3. Step 3: Cross multiply
    78,528,077.30x = 117,792,115.95 × 30,659,021.30
  4. Step 4: Simplify right side
    78,528,077.30x = 3,611,390,991,883,120
  5. Step 5: Solve for x
    x = 3,611,390,991,883,120/78,528,077.30
  6. Step 6: Final answer
    x = 45,988,531.95

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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.