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Finding the Fourth Proportional to 231,630.84, 347,449.91 and 91,388.25

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Solution

The fourth proportional to 231,630.84, 347,449.91 and 91,388.25 is: 137,083.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,630.84 : 347,449.91 = 91,388.25 : x
  2. Step 2: Convert to fraction form
    231,630.84/347,449.91 = 91,388.25/x
  3. Step 3: Cross multiply
    231,630.84x = 347,449.91 × 91,388.25
  4. Step 4: Simplify right side
    231,630.84x = 31,752,838,780.62
  5. Step 5: Solve for x
    x = 31,752,838,780.62/231,630.84
  6. Step 6: Final answer
    x = 137,083.81

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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.