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Finding the Fourth Proportional to 78,279.66, 108,082.10 and 48,105.44

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Solution

The fourth proportional to 78,279.66, 108,082.10 and 48,105.44 is: 66,420.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,279.66 : 108,082.10 = 48,105.44 : x
  2. Step 2: Convert to fraction form
    78,279.66/108,082.10 = 48,105.44/x
  3. Step 3: Cross multiply
    78,279.66x = 108,082.10 × 48,105.44
  4. Step 4: Simplify right side
    78,279.66x = 5,199,336,976.62
  5. Step 5: Solve for x
    x = 5,199,336,976.62/78,279.66
  6. Step 6: Final answer
    x = 66,420.03

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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.