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Finding the Fourth Proportional to 80,671.98, 121,007.80 and 38,423.92

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Solution

The fourth proportional to 80,671.98, 121,007.80 and 38,423.92 is: 57,635.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,671.98 : 121,007.80 = 38,423.92 : x
  2. Step 2: Convert to fraction form
    80,671.98/121,007.80 = 38,423.92/x
  3. Step 3: Cross multiply
    80,671.98x = 121,007.80 × 38,423.92
  4. Step 4: Simplify right side
    80,671.98x = 4,649,593,890.91
  5. Step 5: Solve for x
    x = 4,649,593,890.91/80,671.98
  6. Step 6: Final answer
    x = 57,635.80

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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.