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Finding the Fourth Proportional to 138,409.60, 207,614.40 and 124,850.20

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Solution

The fourth proportional to 138,409.60, 207,614.40 and 124,850.20 is: 187,275.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,409.60 : 207,614.40 = 124,850.20 : x
  2. Step 2: Convert to fraction form
    138,409.60/207,614.40 = 124,850.20/x
  3. Step 3: Cross multiply
    138,409.60x = 207,614.40 × 124,850.20
  4. Step 4: Simplify right side
    138,409.60x = 25,920,699,362.88
  5. Step 5: Solve for x
    x = 25,920,699,362.88/138,409.60
  6. Step 6: Final answer
    x = 187,275.30

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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.