Home / 138,729.46-191,447-75,067.92

Finding the Fourth Proportional to 138,729.46, 191,447 and 75,067.92

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Solution

The fourth proportional to 138,729.46, 191,447 and 75,067.92 is: 103,593.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,729.46 : 191,447 = 75,067.92 : x
  2. Step 2: Convert to fraction form
    138,729.46/191,447 = 75,067.92/x
  3. Step 3: Cross multiply
    138,729.46x = 191,447 × 75,067.92
  4. Step 4: Simplify right side
    138,729.46x = 14,371,528,080.24
  5. Step 5: Solve for x
    x = 14,371,528,080.24/138,729.46
  6. Step 6: Final answer
    x = 103,593.92

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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.