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Finding the Fourth Proportional to 261,011.70, 391,517.55 and 74,023.20

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Solution

The fourth proportional to 261,011.70, 391,517.55 and 74,023.20 is: 111,034.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,011.70 : 391,517.55 = 74,023.20 : x
  2. Step 2: Convert to fraction form
    261,011.70/391,517.55 = 74,023.20/x
  3. Step 3: Cross multiply
    261,011.70x = 391,517.55 × 74,023.20
  4. Step 4: Simplify right side
    261,011.70x = 28,981,381,907.16
  5. Step 5: Solve for x
    x = 28,981,381,907.16/261,011.70
  6. Step 6: Final answer
    x = 111,034.80

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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.