Home / 138,539.57-207,508.56-85,069.23

Finding the Fourth Proportional to 138,539.57, 207,508.56 and 85,069.23

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Solution

The fourth proportional to 138,539.57, 207,508.56 and 85,069.23 is: 127,419.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,539.57 : 207,508.56 = 85,069.23 : x
  2. Step 2: Convert to fraction form
    138,539.57/207,508.56 = 85,069.23/x
  3. Step 3: Cross multiply
    138,539.57x = 207,508.56 × 85,069.23
  4. Step 4: Simplify right side
    138,539.57x = 17,652,593,417.61
  5. Step 5: Solve for x
    x = 17,652,593,417.61/138,539.57
  6. Step 6: Final answer
    x = 127,419.15

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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.