Home / 206,831.80-309,919.65-136,629.10

Finding the Fourth Proportional to 206,831.80, 309,919.65 and 136,629.10

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Solution

The fourth proportional to 206,831.80, 309,919.65 and 136,629.10 is: 204,726.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,831.80 : 309,919.65 = 136,629.10 : x
  2. Step 2: Convert to fraction form
    206,831.80/309,919.65 = 136,629.10/x
  3. Step 3: Cross multiply
    206,831.80x = 309,919.65 × 136,629.10
  4. Step 4: Simplify right side
    206,831.80x = 42,344,042,851.82
  5. Step 5: Solve for x
    x = 42,344,042,851.82/206,831.80
  6. Step 6: Final answer
    x = 204,726.95

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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.