Home / 138,066.22-206,767.18-78,721.97

Finding the Fourth Proportional to 138,066.22, 206,767.18 and 78,721.97

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Solution

The fourth proportional to 138,066.22, 206,767.18 and 78,721.97 is: 117,893.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,066.22 : 206,767.18 = 78,721.97 : x
  2. Step 2: Convert to fraction form
    138,066.22/206,767.18 = 78,721.97/x
  3. Step 3: Cross multiply
    138,066.22x = 206,767.18 × 78,721.97
  4. Step 4: Simplify right side
    138,066.22x = 16,277,119,864.25
  5. Step 5: Solve for x
    x = 16,277,119,864.25/138,066.22
  6. Step 6: Final answer
    x = 117,893.57

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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.