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Finding the Fourth Proportional to 261,880.49, 392,843.37 and 72,340.80

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Solution

The fourth proportional to 261,880.49, 392,843.37 and 72,340.80 is: 108,517.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,880.49 : 392,843.37 = 72,340.80 : x
  2. Step 2: Convert to fraction form
    261,880.49/392,843.37 = 72,340.80/x
  3. Step 3: Cross multiply
    261,880.49x = 392,843.37 × 72,340.80
  4. Step 4: Simplify right side
    261,880.49x = 28,418,603,660.50
  5. Step 5: Solve for x
    x = 28,418,603,660.50/261,880.49
  6. Step 6: Final answer
    x = 108,517.45

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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.