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Finding the Fourth Proportional to 86,373.92, 129,456.88 and 39,562.40

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Solution

The fourth proportional to 86,373.92, 129,456.88 and 39,562.40 is: 59,295.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,373.92 : 129,456.88 = 39,562.40 : x
  2. Step 2: Convert to fraction form
    86,373.92/129,456.88 = 39,562.40/x
  3. Step 3: Cross multiply
    86,373.92x = 129,456.88 × 39,562.40
  4. Step 4: Simplify right side
    86,373.92x = 5,121,624,869.31
  5. Step 5: Solve for x
    x = 5,121,624,869.31/86,373.92
  6. Step 6: Final answer
    x = 59,295.96

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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.