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Finding the Fourth Proportional to 71,711.92, 99,135.66 and 65,734.12

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Solution

The fourth proportional to 71,711.92, 99,135.66 and 65,734.12 is: 90,871.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,711.92 : 99,135.66 = 65,734.12 : x
  2. Step 2: Convert to fraction form
    71,711.92/99,135.66 = 65,734.12/x
  3. Step 3: Cross multiply
    71,711.92x = 99,135.66 × 65,734.12
  4. Step 4: Simplify right side
    71,711.92x = 6,516,595,370.72
  5. Step 5: Solve for x
    x = 6,516,595,370.72/71,711.92
  6. Step 6: Final answer
    x = 90,871.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.