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Finding the Fourth Proportional to 261,206.92, 391,679.16 and 121,063.96

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Solution

The fourth proportional to 261,206.92, 391,679.16 and 121,063.96 is: 181,535.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,206.92 : 391,679.16 = 121,063.96 : x
  2. Step 2: Convert to fraction form
    261,206.92/391,679.16 = 121,063.96/x
  3. Step 3: Cross multiply
    261,206.92x = 391,679.16 × 121,063.96
  4. Step 4: Simplify right side
    261,206.92x = 47,418,230,159.07
  5. Step 5: Solve for x
    x = 47,418,230,159.07/261,206.92
  6. Step 6: Final answer
    x = 181,535.12

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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.