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Finding the Fourth Proportional to 261,168.99, 391,753.57 and 71,631.33

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Solution

The fourth proportional to 261,168.99, 391,753.57 and 71,631.33 is: 107,447.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,168.99 : 391,753.57 = 71,631.33 : x
  2. Step 2: Convert to fraction form
    261,168.99/391,753.57 = 71,631.33/x
  3. Step 3: Cross multiply
    261,168.99x = 391,753.57 × 71,631.33
  4. Step 4: Simplify right side
    261,168.99x = 28,061,829,251.35
  5. Step 5: Solve for x
    x = 28,061,829,251.35/261,168.99
  6. Step 6: Final answer
    x = 107,447.02

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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.