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Finding the Fourth Proportional to 67,247.70, 100,944.45 and 42,315.90

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Solution

The fourth proportional to 67,247.70, 100,944.45 and 42,315.90 is: 63,519.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,247.70 : 100,944.45 = 42,315.90 : x
  2. Step 2: Convert to fraction form
    67,247.70/100,944.45 = 42,315.90/x
  3. Step 3: Cross multiply
    67,247.70x = 100,944.45 × 42,315.90
  4. Step 4: Simplify right side
    67,247.70x = 4,271,555,251.76
  5. Step 5: Solve for x
    x = 4,271,555,251.76/67,247.70
  6. Step 6: Final answer
    x = 63,519.72

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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.