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Finding the Fourth Proportional to 138,595.52, 191,291.49 and 87,575.86

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Solution

The fourth proportional to 138,595.52, 191,291.49 and 87,575.86 is: 120,873.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,595.52 : 191,291.49 = 87,575.86 : x
  2. Step 2: Convert to fraction form
    138,595.52/191,291.49 = 87,575.86/x
  3. Step 3: Cross multiply
    138,595.52x = 191,291.49 × 87,575.86
  4. Step 4: Simplify right side
    138,595.52x = 16,752,516,747.43
  5. Step 5: Solve for x
    x = 16,752,516,747.43/138,595.52
  6. Step 6: Final answer
    x = 120,873.44

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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.