Home / 138,921.20-207,161.64-137,658.14

Finding the Fourth Proportional to 138,921.20, 207,161.64 and 137,658.14

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Solution

The fourth proportional to 138,921.20, 207,161.64 and 137,658.14 is: 205,278.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,921.20 : 207,161.64 = 137,658.14 : x
  2. Step 2: Convert to fraction form
    138,921.20/207,161.64 = 137,658.14/x
  3. Step 3: Cross multiply
    138,921.20x = 207,161.64 × 137,658.14
  4. Step 4: Simplify right side
    138,921.20x = 28,517,485,522.16
  5. Step 5: Solve for x
    x = 28,517,485,522.16/138,921.20
  6. Step 6: Final answer
    x = 205,278.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.