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Finding the Fourth Proportional to 87,321.43, 130,888.89 and 49,800.71

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Solution

The fourth proportional to 87,321.43, 130,888.89 and 49,800.71 is: 74,647.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,321.43 : 130,888.89 = 49,800.71 : x
  2. Step 2: Convert to fraction form
    87,321.43/130,888.89 = 49,800.71/x
  3. Step 3: Cross multiply
    87,321.43x = 130,888.89 × 49,800.71
  4. Step 4: Simplify right side
    87,321.43x = 6,518,359,653.11
  5. Step 5: Solve for x
    x = 6,518,359,653.11/87,321.43
  6. Step 6: Final answer
    x = 74,647.88

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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.