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Finding the Fourth Proportional to 86,562.88, 129,740.16 and 56,591.20

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Solution

The fourth proportional to 86,562.88, 129,740.16 and 56,591.20 is: 84,818.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,562.88 : 129,740.16 = 56,591.20 : x
  2. Step 2: Convert to fraction form
    86,562.88/129,740.16 = 56,591.20/x
  3. Step 3: Cross multiply
    86,562.88x = 129,740.16 × 56,591.20
  4. Step 4: Simplify right side
    86,562.88x = 7,342,151,342.59
  5. Step 5: Solve for x
    x = 7,342,151,342.59/86,562.88
  6. Step 6: Final answer
    x = 84,818.70

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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.