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Finding the Fourth Proportional to 80,727.80, 121,091.70 and 63,212.60

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Solution

The fourth proportional to 80,727.80, 121,091.70 and 63,212.60 is: 94,818.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,727.80 : 121,091.70 = 63,212.60 : x
  2. Step 2: Convert to fraction form
    80,727.80/121,091.70 = 63,212.60/x
  3. Step 3: Cross multiply
    80,727.80x = 121,091.70 × 63,212.60
  4. Step 4: Simplify right side
    80,727.80x = 7,654,521,195.42
  5. Step 5: Solve for x
    x = 7,654,521,195.42/80,727.80
  6. Step 6: Final answer
    x = 94,818.90

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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.