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Finding the Fourth Proportional to 86,375.31, 129,580.89 and 36,455.82

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Solution

The fourth proportional to 86,375.31, 129,580.89 and 36,455.82 is: 54,691.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,375.31 : 129,580.89 = 36,455.82 : x
  2. Step 2: Convert to fraction form
    86,375.31/129,580.89 = 36,455.82/x
  3. Step 3: Cross multiply
    86,375.31x = 129,580.89 × 36,455.82
  4. Step 4: Simplify right side
    86,375.31x = 4,723,977,925.23
  5. Step 5: Solve for x
    x = 4,723,977,925.23/86,375.31
  6. Step 6: Final answer
    x = 54,691.30

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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.