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Finding the Fourth Proportional to 66,766.32, 100,136.70 and 20,019.20

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Solution

The fourth proportional to 66,766.32, 100,136.70 and 20,019.20 is: 30,024.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,766.32 : 100,136.70 = 20,019.20 : x
  2. Step 2: Convert to fraction form
    66,766.32/100,136.70 = 20,019.20/x
  3. Step 3: Cross multiply
    66,766.32x = 100,136.70 × 20,019.20
  4. Step 4: Simplify right side
    66,766.32x = 2,004,656,123.96
  5. Step 5: Solve for x
    x = 2,004,656,123.96/66,766.32
  6. Step 6: Final answer
    x = 30,024.96

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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.