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Finding the Fourth Proportional to 261,880.25, 392,843.00 and 72,340.55

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Solution

The fourth proportional to 261,880.25, 392,843.00 and 72,340.55 is: 108,517.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,880.25 : 392,843.00 = 72,340.55 : x
  2. Step 2: Convert to fraction form
    261,880.25/392,843.00 = 72,340.55/x
  3. Step 3: Cross multiply
    261,880.25x = 392,843.00 × 72,340.55
  4. Step 4: Simplify right side
    261,880.25x = 28,418,476,357.73
  5. Step 5: Solve for x
    x = 28,418,476,357.73/261,880.25
  6. Step 6: Final answer
    x = 108,517.07

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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.