Home / 138,834.55-191,494.24-85,140.97

Finding the Fourth Proportional to 138,834.55, 191,494.24 and 85,140.97

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Solution

The fourth proportional to 138,834.55, 191,494.24 and 85,140.97 is: 117,434.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,834.55 : 191,494.24 = 85,140.97 : x
  2. Step 2: Convert to fraction form
    138,834.55/191,494.24 = 85,140.97/x
  3. Step 3: Cross multiply
    138,834.55x = 191,494.24 × 85,140.97
  4. Step 4: Simplify right side
    138,834.55x = 16,304,005,343.01
  5. Step 5: Solve for x
    x = 16,304,005,343.01/138,834.55
  6. Step 6: Final answer
    x = 117,434.78

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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.