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Finding the Fourth Proportional to 87,576, 131,329.98 and 28,397.40

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Solution

The fourth proportional to 87,576, 131,329.98 and 28,397.40 is: 42,585.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,576 : 131,329.98 = 28,397.40 : x
  2. Step 2: Convert to fraction form
    87,576/131,329.98 = 28,397.40/x
  3. Step 3: Cross multiply
    87,576x = 131,329.98 × 28,397.40
  4. Step 4: Simplify right side
    87,576x = 3,729,429,974.05
  5. Step 5: Solve for x
    x = 3,729,429,974.05/87,576
  6. Step 6: Final answer
    x = 42,585.07

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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.