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Finding the Fourth Proportional to 68,812.20, 103,193.10 and 54,049.86

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Solution

The fourth proportional to 68,812.20, 103,193.10 and 54,049.86 is: 81,055.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,812.20 : 103,193.10 = 54,049.86 : x
  2. Step 2: Convert to fraction form
    68,812.20/103,193.10 = 54,049.86/x
  3. Step 3: Cross multiply
    68,812.20x = 103,193.10 × 54,049.86
  4. Step 4: Simplify right side
    68,812.20x = 5,577,572,607.97
  5. Step 5: Solve for x
    x = 5,577,572,607.97/68,812.20
  6. Step 6: Final answer
    x = 81,055.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.