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Finding the Fourth Proportional to 81,373.64, 121,723.44 and 76,397

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Solution

The fourth proportional to 81,373.64, 121,723.44 and 76,397 is: 114,279.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,373.64 : 121,723.44 = 76,397 : x
  2. Step 2: Convert to fraction form
    81,373.64/121,723.44 = 76,397/x
  3. Step 3: Cross multiply
    81,373.64x = 121,723.44 × 76,397
  4. Step 4: Simplify right side
    81,373.64x = 9,299,305,645.68
  5. Step 5: Solve for x
    x = 9,299,305,645.68/81,373.64
  6. Step 6: Final answer
    x = 114,279.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.