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Finding the Fourth Proportional to 71,288.79, 98,379.41 and 39,460.65

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Solution

The fourth proportional to 71,288.79, 98,379.41 and 39,460.65 is: 54,456.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,288.79 : 98,379.41 = 39,460.65 : x
  2. Step 2: Convert to fraction form
    71,288.79/98,379.41 = 39,460.65/x
  3. Step 3: Cross multiply
    71,288.79x = 98,379.41 × 39,460.65
  4. Step 4: Simplify right side
    71,288.79x = 3,882,115,267.91
  5. Step 5: Solve for x
    x = 3,882,115,267.91/71,288.79
  6. Step 6: Final answer
    x = 54,456.18

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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.