Home / 138,743.52-208,146-76,381.92

Finding the Fourth Proportional to 138,743.52, 208,146 and 76,381.92

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Solution

The fourth proportional to 138,743.52, 208,146 and 76,381.92 is: 114,589.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,743.52 : 208,146 = 76,381.92 : x
  2. Step 2: Convert to fraction form
    138,743.52/208,146 = 76,381.92/x
  3. Step 3: Cross multiply
    138,743.52x = 208,146 × 76,381.92
  4. Step 4: Simplify right side
    138,743.52x = 15,898,591,120.32
  5. Step 5: Solve for x
    x = 15,898,591,120.32/138,743.52
  6. Step 6: Final answer
    x = 114,589.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.