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Finding the Fourth Proportional to 261,912.28, 392,897.40 and 93,471.88

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Solution

The fourth proportional to 261,912.28, 392,897.40 and 93,471.88 is: 140,218.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,912.28 : 392,897.40 = 93,471.88 : x
  2. Step 2: Convert to fraction form
    261,912.28/392,897.40 = 93,471.88/x
  3. Step 3: Cross multiply
    261,912.28x = 392,897.40 × 93,471.88
  4. Step 4: Simplify right side
    261,912.28x = 36,724,858,625.11
  5. Step 5: Solve for x
    x = 36,724,858,625.11/261,912.28
  6. Step 6: Final answer
    x = 140,218.16

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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.