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Finding the Fourth Proportional to 86,565.72, 129,847.20 and 44,421.47

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Solution

The fourth proportional to 86,565.72, 129,847.20 and 44,421.47 is: 66,631.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,565.72 : 129,847.20 = 44,421.47 : x
  2. Step 2: Convert to fraction form
    86,565.72/129,847.20 = 44,421.47/x
  3. Step 3: Cross multiply
    86,565.72x = 129,847.20 × 44,421.47
  4. Step 4: Simplify right side
    86,565.72x = 5,768,002,850.15
  5. Step 5: Solve for x
    x = 5,768,002,850.15/86,565.72
  6. Step 6: Final answer
    x = 66,631.49

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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.