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Finding the Fourth Proportional to 149,565.72, 206,418.42 and 85,044.72

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Solution

The fourth proportional to 149,565.72, 206,418.42 and 85,044.72 is: 117,371.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,565.72 : 206,418.42 = 85,044.72 : x
  2. Step 2: Convert to fraction form
    149,565.72/206,418.42 = 85,044.72/x
  3. Step 3: Cross multiply
    149,565.72x = 206,418.42 × 85,044.72
  4. Step 4: Simplify right side
    149,565.72x = 17,554,796,731.74
  5. Step 5: Solve for x
    x = 17,554,796,731.74/149,565.72
  6. Step 6: Final answer
    x = 117,371.79

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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.