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Finding the Fourth Proportional to 138,951.44, 191,819.10 and 93,090.05

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Solution

The fourth proportional to 138,951.44, 191,819.10 and 93,090.05 is: 128,508.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,951.44 : 191,819.10 = 93,090.05 : x
  2. Step 2: Convert to fraction form
    138,951.44/191,819.10 = 93,090.05/x
  3. Step 3: Cross multiply
    138,951.44x = 191,819.10 × 93,090.05
  4. Step 4: Simplify right side
    138,951.44x = 17,856,448,650.86
  5. Step 5: Solve for x
    x = 17,856,448,650.86/138,951.44
  6. Step 6: Final answer
    x = 128,508.56

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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.