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Finding the Fourth Proportional to 71,960.65, 99,346.28 and 49,899.28

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Solution

The fourth proportional to 71,960.65, 99,346.28 and 49,899.28 is: 68,889.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,960.65 : 99,346.28 = 49,899.28 : x
  2. Step 2: Convert to fraction form
    71,960.65/99,346.28 = 49,899.28/x
  3. Step 3: Cross multiply
    71,960.65x = 99,346.28 × 49,899.28
  4. Step 4: Simplify right side
    71,960.65x = 4,957,307,842.68
  5. Step 5: Solve for x
    x = 4,957,307,842.68/71,960.65
  6. Step 6: Final answer
    x = 68,889.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.