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Finding the Fourth Proportional to 84,404.64, 126,669.20 and 40,031.52

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Solution

The fourth proportional to 84,404.64, 126,669.20 and 40,031.52 is: 60,076.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,404.64 : 126,669.20 = 40,031.52 : x
  2. Step 2: Convert to fraction form
    84,404.64/126,669.20 = 40,031.52/x
  3. Step 3: Cross multiply
    84,404.64x = 126,669.20 × 40,031.52
  4. Step 4: Simplify right side
    84,404.64x = 5,070,760,613.18
  5. Step 5: Solve for x
    x = 5,070,760,613.18/84,404.64
  6. Step 6: Final answer
    x = 60,076.80

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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.