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Finding the Fourth Proportional to 99,911.99, 137,874.26 and 54,589.25

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Solution

The fourth proportional to 99,911.99, 137,874.26 and 54,589.25 is: 75,330.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,911.99 : 137,874.26 = 54,589.25 : x
  2. Step 2: Convert to fraction form
    99,911.99/137,874.26 = 54,589.25/x
  3. Step 3: Cross multiply
    99,911.99x = 137,874.26 × 54,589.25
  4. Step 4: Simplify right side
    99,911.99x = 7,526,451,894.81
  5. Step 5: Solve for x
    x = 7,526,451,894.81/99,911.99
  6. Step 6: Final answer
    x = 75,330.82

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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.