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Finding the Fourth Proportional to 261,291.33, 391,937.58 and 71,754.30

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Solution

The fourth proportional to 261,291.33, 391,937.58 and 71,754.30 is: 107,631.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,291.33 : 391,937.58 = 71,754.30 : x
  2. Step 2: Convert to fraction form
    261,291.33/391,937.58 = 71,754.30/x
  3. Step 3: Cross multiply
    261,291.33x = 391,937.58 × 71,754.30
  4. Step 4: Simplify right side
    261,291.33x = 28,123,206,696.59
  5. Step 5: Solve for x
    x = 28,123,206,696.59/261,291.33
  6. Step 6: Final answer
    x = 107,631.61

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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.