Home / 78,418.20-117,627.30-77,122.20

Finding the Fourth Proportional to 78,418.20, 117,627.30 and 77,122.20

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Solution

The fourth proportional to 78,418.20, 117,627.30 and 77,122.20 is: 115,683.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,418.20 : 117,627.30 = 77,122.20 : x
  2. Step 2: Convert to fraction form
    78,418.20/117,627.30 = 77,122.20/x
  3. Step 3: Cross multiply
    78,418.20x = 117,627.30 × 77,122.20
  4. Step 4: Simplify right side
    78,418.20x = 9,071,676,156.06
  5. Step 5: Solve for x
    x = 9,071,676,156.06/78,418.20
  6. Step 6: Final answer
    x = 115,683.30

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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.