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Finding the Fourth Proportional to 261,753.80, 392,608.80 and 103,939.88

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Solution

The fourth proportional to 261,753.80, 392,608.80 and 103,939.88 is: 155,901.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,753.80 : 392,608.80 = 103,939.88 : x
  2. Step 2: Convert to fraction form
    261,753.80/392,608.80 = 103,939.88/x
  3. Step 3: Cross multiply
    261,753.80x = 392,608.80 × 103,939.88
  4. Step 4: Simplify right side
    261,753.80x = 40,807,709,595.90
  5. Step 5: Solve for x
    x = 40,807,709,595.90/261,753.80
  6. Step 6: Final answer
    x = 155,901.12

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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.