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Finding the Fourth Proportional to 88,321.62, 121,919.13 and 54,343.88

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Solution

The fourth proportional to 88,321.62, 121,919.13 and 54,343.88 is: 75,016.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,321.62 : 121,919.13 = 54,343.88 : x
  2. Step 2: Convert to fraction form
    88,321.62/121,919.13 = 54,343.88/x
  3. Step 3: Cross multiply
    88,321.62x = 121,919.13 × 54,343.88
  4. Step 4: Simplify right side
    88,321.62x = 6,625,558,570.42
  5. Step 5: Solve for x
    x = 6,625,558,570.42/88,321.62
  6. Step 6: Final answer
    x = 75,016.27

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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.