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Finding the Fourth Proportional to 86,489.55, 129,747.69 and 36,569.88

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Solution

The fourth proportional to 86,489.55, 129,747.69 and 36,569.88 is: 54,860.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,489.55 : 129,747.69 = 36,569.88 : x
  2. Step 2: Convert to fraction form
    86,489.55/129,747.69 = 36,569.88/x
  3. Step 3: Cross multiply
    86,489.55x = 129,747.69 × 36,569.88
  4. Step 4: Simplify right side
    86,489.55x = 4,744,857,453.58
  5. Step 5: Solve for x
    x = 4,744,857,453.58/86,489.55
  6. Step 6: Final answer
    x = 54,860.47

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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.