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Finding the Fourth Proportional to 231,220, 319,083.60 and 125,236

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Solution

The fourth proportional to 231,220, 319,083.60 and 125,236 is: 172,825.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,220 : 319,083.60 = 125,236 : x
  2. Step 2: Convert to fraction form
    231,220/319,083.60 = 125,236/x
  3. Step 3: Cross multiply
    231,220x = 319,083.60 × 125,236
  4. Step 4: Simplify right side
    231,220x = 39,960,753,729.60
  5. Step 5: Solve for x
    x = 39,960,753,729.60/231,220
  6. Step 6: Final answer
    x = 172,825.68

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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.