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Finding the Fourth Proportional to 207,843.38, 286,920.42 and 121,790.42

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Solution

The fourth proportional to 207,843.38, 286,920.42 and 121,790.42 is: 168,127.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,843.38 : 286,920.42 = 121,790.42 : x
  2. Step 2: Convert to fraction form
    207,843.38/286,920.42 = 121,790.42/x
  3. Step 3: Cross multiply
    207,843.38x = 286,920.42 × 121,790.42
  4. Step 4: Simplify right side
    207,843.38x = 34,944,157,643.01
  5. Step 5: Solve for x
    x = 34,944,157,643.01/207,843.38
  6. Step 6: Final answer
    x = 168,127.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.