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Finding the Fourth Proportional to 113,540.78, 156,691.09 and 63,239.78

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Solution

The fourth proportional to 113,540.78, 156,691.09 and 63,239.78 is: 87,273.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,540.78 : 156,691.09 = 63,239.78 : x
  2. Step 2: Convert to fraction form
    113,540.78/156,691.09 = 63,239.78/x
  3. Step 3: Cross multiply
    113,540.78x = 156,691.09 × 63,239.78
  4. Step 4: Simplify right side
    113,540.78x = 9,909,110,059.56
  5. Step 5: Solve for x
    x = 9,909,110,059.56/113,540.78
  6. Step 6: Final answer
    x = 87,273.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.