Home / 138,719.20-207,787.20-115,391.20

Finding the Fourth Proportional to 138,719.20, 207,787.20 and 115,391.20

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Solution

The fourth proportional to 138,719.20, 207,787.20 and 115,391.20 is: 172,844.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,719.20 : 207,787.20 = 115,391.20 : x
  2. Step 2: Convert to fraction form
    138,719.20/207,787.20 = 115,391.20/x
  3. Step 3: Cross multiply
    138,719.20x = 207,787.20 × 115,391.20
  4. Step 4: Simplify right side
    138,719.20x = 23,976,814,352.64
  5. Step 5: Solve for x
    x = 23,976,814,352.64/138,719.20
  6. Step 6: Final answer
    x = 172,844.24

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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.