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Finding the Fourth Proportional to 236,651.20, 326,591.88 and 129,231.20

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Solution

The fourth proportional to 236,651.20, 326,591.88 and 129,231.20 is: 178,346.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,651.20 : 326,591.88 = 129,231.20 : x
  2. Step 2: Convert to fraction form
    236,651.20/326,591.88 = 129,231.20/x
  3. Step 3: Cross multiply
    236,651.20x = 326,591.88 × 129,231.20
  4. Step 4: Simplify right side
    236,651.20x = 42,205,860,562.66
  5. Step 5: Solve for x
    x = 42,205,860,562.66/236,651.20
  6. Step 6: Final answer
    x = 178,346.28

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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.