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Finding the Fourth Proportional to 138,740.63, 191,463.44 and 75,079.79

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Solution

The fourth proportional to 138,740.63, 191,463.44 and 75,079.79 is: 103,610.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,740.63 : 191,463.44 = 75,079.79 : x
  2. Step 2: Convert to fraction form
    138,740.63/191,463.44 = 75,079.79/x
  3. Step 3: Cross multiply
    138,740.63x = 191,463.44 × 75,079.79
  4. Step 4: Simplify right side
    138,740.63x = 14,375,034,253.15
  5. Step 5: Solve for x
    x = 14,375,034,253.15/138,740.63
  6. Step 6: Final answer
    x = 103,610.85

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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.