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Finding the Fourth Proportional to 45,311.70, 67,967.55 and 20,363.70

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Solution

The fourth proportional to 45,311.70, 67,967.55 and 20,363.70 is: 30,545.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,311.70 : 67,967.55 = 20,363.70 : x
  2. Step 2: Convert to fraction form
    45,311.70/67,967.55 = 20,363.70/x
  3. Step 3: Cross multiply
    45,311.70x = 67,967.55 × 20,363.70
  4. Step 4: Simplify right side
    45,311.70x = 1,384,070,797.94
  5. Step 5: Solve for x
    x = 1,384,070,797.94/45,311.70
  6. Step 6: Final answer
    x = 30,545.55

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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.