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Finding the Fourth Proportional to 99,121.98, 136,755 and 56,650.44

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Solution

The fourth proportional to 99,121.98, 136,755 and 56,650.44 is: 78,158.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,121.98 : 136,755 = 56,650.44 : x
  2. Step 2: Convert to fraction form
    99,121.98/136,755 = 56,650.44/x
  3. Step 3: Cross multiply
    99,121.98x = 136,755 × 56,650.44
  4. Step 4: Simplify right side
    99,121.98x = 7,747,230,922.20
  5. Step 5: Solve for x
    x = 7,747,230,922.20/99,121.98
  6. Step 6: Final answer
    x = 78,158.56

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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.