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Finding the Fourth Proportional to 71,181.90, 98,240.85 and 40,966.65

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Solution

The fourth proportional to 71,181.90, 98,240.85 and 40,966.65 is: 56,539.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,181.90 : 98,240.85 = 40,966.65 : x
  2. Step 2: Convert to fraction form
    71,181.90/98,240.85 = 40,966.65/x
  3. Step 3: Cross multiply
    71,181.90x = 98,240.85 × 40,966.65
  4. Step 4: Simplify right side
    71,181.90x = 4,024,598,517.65
  5. Step 5: Solve for x
    x = 4,024,598,517.65/71,181.90
  6. Step 6: Final answer
    x = 56,539.63

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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.