Home / 138,614.76-206,919.50-121,799.57

Finding the Fourth Proportional to 138,614.76, 206,919.50 and 121,799.57

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Solution

The fourth proportional to 138,614.76, 206,919.50 and 121,799.57 is: 181,818.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,614.76 : 206,919.50 = 121,799.57 : x
  2. Step 2: Convert to fraction form
    138,614.76/206,919.50 = 121,799.57/x
  3. Step 3: Cross multiply
    138,614.76x = 206,919.50 × 121,799.57
  4. Step 4: Simplify right side
    138,614.76x = 25,202,704,481.02
  5. Step 5: Solve for x
    x = 25,202,704,481.02/138,614.76
  6. Step 6: Final answer
    x = 181,818.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.