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Finding the Fourth Proportional to 86,624.88, 129,937.32 and 20,960.88

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Solution

The fourth proportional to 86,624.88, 129,937.32 and 20,960.88 is: 31,441.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,624.88 : 129,937.32 = 20,960.88 : x
  2. Step 2: Convert to fraction form
    86,624.88/129,937.32 = 20,960.88/x
  3. Step 3: Cross multiply
    86,624.88x = 129,937.32 × 20,960.88
  4. Step 4: Simplify right side
    86,624.88x = 2,723,600,572.04
  5. Step 5: Solve for x
    x = 2,723,600,572.04/86,624.88
  6. Step 6: Final answer
    x = 31,441.32

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Similar ratio
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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.