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Finding the Fourth Proportional to 57,761.38, 86,652.87 and 18,307.90

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Solution

The fourth proportional to 57,761.38, 86,652.87 and 18,307.90 is: 27,465.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,761.38 : 86,652.87 = 18,307.90 : x
  2. Step 2: Convert to fraction form
    57,761.38/86,652.87 = 18,307.90/x
  3. Step 3: Cross multiply
    57,761.38x = 86,652.87 × 18,307.90
  4. Step 4: Simplify right side
    57,761.38x = 1,586,432,078.67
  5. Step 5: Solve for x
    x = 1,586,432,078.67/57,761.38
  6. Step 6: Final answer
    x = 27,465.27

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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.