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Finding the Fourth Proportional to 381,384.43, 572,169.12 and 115,129.03

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Solution

The fourth proportional to 381,384.43, 572,169.12 and 115,129.03 is: 172,721.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,384.43 : 572,169.12 = 115,129.03 : x
  2. Step 2: Convert to fraction form
    381,384.43/572,169.12 = 115,129.03/x
  3. Step 3: Cross multiply
    381,384.43x = 572,169.12 × 115,129.03
  4. Step 4: Simplify right side
    381,384.43x = 65,873,275,781.55
  5. Step 5: Solve for x
    x = 65,873,275,781.55/381,384.43
  6. Step 6: Final answer
    x = 172,721.46

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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.