Home / 138,619.20-207,637.20-115,291.20

Finding the Fourth Proportional to 138,619.20, 207,637.20 and 115,291.20

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Solution

The fourth proportional to 138,619.20, 207,637.20 and 115,291.20 is: 172,694.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,619.20 : 207,637.20 = 115,291.20 : x
  2. Step 2: Convert to fraction form
    138,619.20/207,637.20 = 115,291.20/x
  3. Step 3: Cross multiply
    138,619.20x = 207,637.20 × 115,291.20
  4. Step 4: Simplify right side
    138,619.20x = 23,938,741,952.64
  5. Step 5: Solve for x
    x = 23,938,741,952.64/138,619.20
  6. Step 6: Final answer
    x = 172,694.27

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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.