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Finding the Fourth Proportional to 168,615.93, 253,103.96 and 72,600.66

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Solution

The fourth proportional to 168,615.93, 253,103.96 and 72,600.66 is: 108,978.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,615.93 : 253,103.96 = 72,600.66 : x
  2. Step 2: Convert to fraction form
    168,615.93/253,103.96 = 72,600.66/x
  3. Step 3: Cross multiply
    168,615.93x = 253,103.96 × 72,600.66
  4. Step 4: Simplify right side
    168,615.93x = 18,375,514,317.74
  5. Step 5: Solve for x
    x = 18,375,514,317.74/168,615.93
  6. Step 6: Final answer
    x = 108,978.52

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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.