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Finding the Fourth Proportional to 71,685.91, 98,780.66 and 55,454.62

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Solution

The fourth proportional to 71,685.91, 98,780.66 and 55,454.62 is: 76,414.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,685.91 : 98,780.66 = 55,454.62 : x
  2. Step 2: Convert to fraction form
    71,685.91/98,780.66 = 55,454.62/x
  3. Step 3: Cross multiply
    71,685.91x = 98,780.66 × 55,454.62
  4. Step 4: Simplify right side
    71,685.91x = 5,477,843,963.65
  5. Step 5: Solve for x
    x = 5,477,843,963.65/71,685.91
  6. Step 6: Final answer
    x = 76,414.51

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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.