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Finding the Fourth Proportional to 71,169.74, 98,211.90 and 39,338.48

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Solution

The fourth proportional to 71,169.74, 98,211.90 and 39,338.48 is: 54,285.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,169.74 : 98,211.90 = 39,338.48 : x
  2. Step 2: Convert to fraction form
    71,169.74/98,211.90 = 39,338.48/x
  3. Step 3: Cross multiply
    71,169.74x = 98,211.90 × 39,338.48
  4. Step 4: Simplify right side
    71,169.74x = 3,863,506,863.91
  5. Step 5: Solve for x
    x = 3,863,506,863.91/71,169.74
  6. Step 6: Final answer
    x = 54,285.81

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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.