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Finding the Fourth Proportional to 80,808.52, 121,212.80 and 25,404.52

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Solution

The fourth proportional to 80,808.52, 121,212.80 and 25,404.52 is: 38,106.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,808.52 : 121,212.80 = 25,404.52 : x
  2. Step 2: Convert to fraction form
    80,808.52/121,212.80 = 25,404.52/x
  3. Step 3: Cross multiply
    80,808.52x = 121,212.80 × 25,404.52
  4. Step 4: Simplify right side
    80,808.52x = 3,079,353,001.86
  5. Step 5: Solve for x
    x = 3,079,353,001.86/80,808.52
  6. Step 6: Final answer
    x = 38,106.79

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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.