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Finding the Fourth Proportional to 87,860.79, 131,860.89 and 45,752.85

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Solution

The fourth proportional to 87,860.79, 131,860.89 and 45,752.85 is: 68,665.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,860.79 : 131,860.89 = 45,752.85 : x
  2. Step 2: Convert to fraction form
    87,860.79/131,860.89 = 45,752.85/x
  3. Step 3: Cross multiply
    87,860.79x = 131,860.89 × 45,752.85
  4. Step 4: Simplify right side
    87,860.79x = 6,033,011,521.04
  5. Step 5: Solve for x
    x = 6,033,011,521.04/87,860.79
  6. Step 6: Final answer
    x = 68,665.57

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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.