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Finding the Fourth Proportional to 261,103.67, 391,591.92 and 109,218.65

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Solution

The fourth proportional to 261,103.67, 391,591.92 and 109,218.65 is: 163,801.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,103.67 : 391,591.92 = 109,218.65 : x
  2. Step 2: Convert to fraction form
    261,103.67/391,591.92 = 109,218.65/x
  3. Step 3: Cross multiply
    261,103.67x = 391,591.92 × 109,218.65
  4. Step 4: Simplify right side
    261,103.67x = 42,769,140,307.21
  5. Step 5: Solve for x
    x = 42,769,140,307.21/261,103.67
  6. Step 6: Final answer
    x = 163,801.38

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1.5x scale

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.