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Finding the Fourth Proportional to 64,861.92, 89,531.76 and 38,013.12

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Solution

The fourth proportional to 64,861.92, 89,531.76 and 38,013.12 is: 52,471.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,861.92 : 89,531.76 = 38,013.12 : x
  2. Step 2: Convert to fraction form
    64,861.92/89,531.76 = 38,013.12/x
  3. Step 3: Cross multiply
    64,861.92x = 89,531.76 × 38,013.12
  4. Step 4: Simplify right side
    64,861.92x = 3,403,381,536.69
  5. Step 5: Solve for x
    x = 3,403,381,536.69/64,861.92
  6. Step 6: Final answer
    x = 52,471.18

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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.