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Finding the Fourth Proportional to 261,891.20, 361,392.18 and 154,456.04

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Solution

The fourth proportional to 261,891.20, 361,392.18 and 154,456.04 is: 213,138.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,891.20 : 361,392.18 = 154,456.04 : x
  2. Step 2: Convert to fraction form
    261,891.20/361,392.18 = 154,456.04/x
  3. Step 3: Cross multiply
    261,891.20x = 361,392.18 × 154,456.04
  4. Step 4: Simplify right side
    261,891.20x = 55,819,205,009.77
  5. Step 5: Solve for x
    x = 55,819,205,009.77/261,891.20
  6. Step 6: Final answer
    x = 213,138.91

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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.