Home / 85,680.06-128,495.43-29,517.90

Finding the Fourth Proportional to 85,680.06, 128,495.43 and 29,517.90

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Solution

The fourth proportional to 85,680.06, 128,495.43 and 29,517.90 is: 44,268.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,680.06 : 128,495.43 = 29,517.90 : x
  2. Step 2: Convert to fraction form
    85,680.06/128,495.43 = 29,517.90/x
  3. Step 3: Cross multiply
    85,680.06x = 128,495.43 × 29,517.90
  4. Step 4: Simplify right side
    85,680.06x = 3,792,915,253.20
  5. Step 5: Solve for x
    x = 3,792,915,253.20/85,680.06
  6. Step 6: Final answer
    x = 44,268.35

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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.