Home / 138,180.35-207,258.61-84,131.02

Finding the Fourth Proportional to 138,180.35, 207,258.61 and 84,131.02

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Solution

The fourth proportional to 138,180.35, 207,258.61 and 84,131.02 is: 126,189.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,180.35 : 207,258.61 = 84,131.02 : x
  2. Step 2: Convert to fraction form
    138,180.35/207,258.61 = 84,131.02/x
  3. Step 3: Cross multiply
    138,180.35x = 207,258.61 × 84,131.02
  4. Step 4: Simplify right side
    138,180.35x = 17,436,877,534.61
  5. Step 5: Solve for x
    x = 17,436,877,534.61/138,180.35
  6. Step 6: Final answer
    x = 126,189.27

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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.