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Finding the Fourth Proportional to 79,047.68, 109,142.84 and 48,874.37

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Solution

The fourth proportional to 79,047.68, 109,142.84 and 48,874.37 is: 67,481.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,047.68 : 109,142.84 = 48,874.37 : x
  2. Step 2: Convert to fraction form
    79,047.68/109,142.84 = 48,874.37/x
  3. Step 3: Cross multiply
    79,047.68x = 109,142.84 × 48,874.37
  4. Step 4: Simplify right side
    79,047.68x = 5,334,287,121.48
  5. Step 5: Solve for x
    x = 5,334,287,121.48/79,047.68
  6. Step 6: Final answer
    x = 67,481.90

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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.