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Finding the Fourth Proportional to 86,352.60, 129,484.78 and 39,565.40

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Solution

The fourth proportional to 86,352.60, 129,484.78 and 39,565.40 is: 59,327.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,352.60 : 129,484.78 = 39,565.40 : x
  2. Step 2: Convert to fraction form
    86,352.60/129,484.78 = 39,565.40/x
  3. Step 3: Cross multiply
    86,352.60x = 129,484.78 × 39,565.40
  4. Step 4: Simplify right side
    86,352.60x = 5,123,117,114.61
  5. Step 5: Solve for x
    x = 5,123,117,114.61/86,352.60
  6. Step 6: Final answer
    x = 59,327.88

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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.