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Finding the Fourth Proportional to 89,755.71, 134,485.92 and 71,155.28

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Solution

The fourth proportional to 89,755.71, 134,485.92 and 71,155.28 is: 106,615.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,755.71 : 134,485.92 = 71,155.28 : x
  2. Step 2: Convert to fraction form
    89,755.71/134,485.92 = 71,155.28/x
  3. Step 3: Cross multiply
    89,755.71x = 134,485.92 × 71,155.28
  4. Step 4: Simplify right side
    89,755.71x = 9,569,382,621.23
  5. Step 5: Solve for x
    x = 9,569,382,621.23/89,755.71
  6. Step 6: Final answer
    x = 106,615.86

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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.