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Finding the Fourth Proportional to 91,887.11, 137,747.44 and 63,820.42

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Solution

The fourth proportional to 91,887.11, 137,747.44 and 63,820.42 is: 95,672.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,887.11 : 137,747.44 = 63,820.42 : x
  2. Step 2: Convert to fraction form
    91,887.11/137,747.44 = 63,820.42/x
  3. Step 3: Cross multiply
    91,887.11x = 137,747.44 × 63,820.42
  4. Step 4: Simplify right side
    91,887.11x = 8,791,099,474.72
  5. Step 5: Solve for x
    x = 8,791,099,474.72/91,887.11
  6. Step 6: Final answer
    x = 95,672.83

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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.