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Finding the Fourth Proportional to 31,451.62, 47,177.43 and 8,078.08

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Solution

The fourth proportional to 31,451.62, 47,177.43 and 8,078.08 is: 12,117.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,451.62 : 47,177.43 = 8,078.08 : x
  2. Step 2: Convert to fraction form
    31,451.62/47,177.43 = 8,078.08/x
  3. Step 3: Cross multiply
    31,451.62x = 47,177.43 × 8,078.08
  4. Step 4: Simplify right side
    31,451.62x = 381,103,053.73
  5. Step 5: Solve for x
    x = 381,103,053.73/31,451.62
  6. Step 6: Final answer
    x = 12,117.12

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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.