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Finding the Fourth Proportional to 324,020.78, 486,031.17 and 102,387.50

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Solution

The fourth proportional to 324,020.78, 486,031.17 and 102,387.50 is: 153,581.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,020.78 : 486,031.17 = 102,387.50 : x
  2. Step 2: Convert to fraction form
    324,020.78/486,031.17 = 102,387.50/x
  3. Step 3: Cross multiply
    324,020.78x = 486,031.17 × 102,387.50
  4. Step 4: Simplify right side
    324,020.78x = 49,763,516,418.38
  5. Step 5: Solve for x
    x = 49,763,516,418.38/324,020.78
  6. Step 6: Final answer
    x = 153,581.25

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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.