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Finding the Fourth Proportional to 80,372.88, 110,916 and 48,543.12

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Solution

The fourth proportional to 80,372.88, 110,916 and 48,543.12 is: 66,990.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,372.88 : 110,916 = 48,543.12 : x
  2. Step 2: Convert to fraction form
    80,372.88/110,916 = 48,543.12/x
  3. Step 3: Cross multiply
    80,372.88x = 110,916 × 48,543.12
  4. Step 4: Simplify right side
    80,372.88x = 5,384,208,697.92
  5. Step 5: Solve for x
    x = 5,384,208,697.92/80,372.88
  6. Step 6: Final answer
    x = 66,990.37

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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.