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Finding the Fourth Proportional to 71,155.85, 98,204.46 and 68,819.18

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Solution

The fourth proportional to 71,155.85, 98,204.46 and 68,819.18 is: 94,979.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,155.85 : 98,204.46 = 68,819.18 : x
  2. Step 2: Convert to fraction form
    71,155.85/98,204.46 = 68,819.18/x
  3. Step 3: Cross multiply
    71,155.85x = 98,204.46 × 68,819.18
  4. Step 4: Simplify right side
    71,155.85x = 6,758,350,409.54
  5. Step 5: Solve for x
    x = 6,758,350,409.54/71,155.85
  6. Step 6: Final answer
    x = 94,979.55

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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.