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Finding the Fourth Proportional to 145,042.72, 217,723.19 and 115,248.49

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Solution

The fourth proportional to 145,042.72, 217,723.19 and 115,248.49 is: 172,999.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,042.72 : 217,723.19 = 115,248.49 : x
  2. Step 2: Convert to fraction form
    145,042.72/217,723.19 = 115,248.49/x
  3. Step 3: Cross multiply
    145,042.72x = 217,723.19 × 115,248.49
  4. Step 4: Simplify right side
    145,042.72x = 25,092,267,764.93
  5. Step 5: Solve for x
    x = 25,092,267,764.93/145,042.72
  6. Step 6: Final answer
    x = 172,999.16

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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.