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Finding the Fourth Proportional to 261,243.88, 391,808.22 and 127,992.04

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Solution

The fourth proportional to 261,243.88, 391,808.22 and 127,992.04 is: 191,959.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,243.88 : 391,808.22 = 127,992.04 : x
  2. Step 2: Convert to fraction form
    261,243.88/391,808.22 = 127,992.04/x
  3. Step 3: Cross multiply
    261,243.88x = 391,808.22 × 127,992.04
  4. Step 4: Simplify right side
    261,243.88x = 50,148,333,366.57
  5. Step 5: Solve for x
    x = 50,148,333,366.57/261,243.88
  6. Step 6: Final answer
    x = 191,959.84

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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.