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Finding the Fourth Proportional to 138,004.30, 206,897.10 and 75,674.80

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Solution

The fourth proportional to 138,004.30, 206,897.10 and 75,674.80 is: 113,452.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,004.30 : 206,897.10 = 75,674.80 : x
  2. Step 2: Convert to fraction form
    138,004.30/206,897.10 = 75,674.80/x
  3. Step 3: Cross multiply
    138,004.30x = 206,897.10 × 75,674.80
  4. Step 4: Simplify right side
    138,004.30x = 15,656,896,663.08
  5. Step 5: Solve for x
    x = 15,656,896,663.08/138,004.30
  6. Step 6: Final answer
    x = 113,452.24

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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.