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Finding the Fourth Proportional to 138,911.39, 191,697.70 and 75,249.17

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Solution

The fourth proportional to 138,911.39, 191,697.70 and 75,249.17 is: 103,843.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,911.39 : 191,697.70 = 75,249.17 : x
  2. Step 2: Convert to fraction form
    138,911.39/191,697.70 = 75,249.17/x
  3. Step 3: Cross multiply
    138,911.39x = 191,697.70 × 75,249.17
  4. Step 4: Simplify right side
    138,911.39x = 14,425,092,815.91
  5. Step 5: Solve for x
    x = 14,425,092,815.91/138,911.39
  6. Step 6: Final answer
    x = 103,843.84

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1.5x scale

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.