Home / 138,729.20-208,127.40-40,233.20

Finding the Fourth Proportional to 138,729.20, 208,127.40 and 40,233.20

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Solution

The fourth proportional to 138,729.20, 208,127.40 and 40,233.20 is: 60,359.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,729.20 : 208,127.40 = 40,233.20 : x
  2. Step 2: Convert to fraction form
    138,729.20/208,127.40 = 40,233.20/x
  3. Step 3: Cross multiply
    138,729.20x = 208,127.40 × 40,233.20
  4. Step 4: Simplify right side
    138,729.20x = 8,373,631,309.68
  5. Step 5: Solve for x
    x = 8,373,631,309.68/138,729.20
  6. Step 6: Final answer
    x = 60,359.54

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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.