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Finding the Fourth Proportional to 67,292.82, 100,939.64 and 20,545.70

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Solution

The fourth proportional to 67,292.82, 100,939.64 and 20,545.70 is: 30,818.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,292.82 : 100,939.64 = 20,545.70 : x
  2. Step 2: Convert to fraction form
    67,292.82/100,939.64 = 20,545.70/x
  3. Step 3: Cross multiply
    67,292.82x = 100,939.64 × 20,545.70
  4. Step 4: Simplify right side
    67,292.82x = 2,073,874,954.12
  5. Step 5: Solve for x
    x = 2,073,874,954.12/67,292.82
  6. Step 6: Final answer
    x = 30,818.67

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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.