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Finding the Fourth Proportional to 66,758.67, 100,154.39 and 20,011.50

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Solution

The fourth proportional to 66,758.67, 100,154.39 and 20,011.50 is: 30,022.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,758.67 : 100,154.39 = 20,011.50 : x
  2. Step 2: Convert to fraction form
    66,758.67/100,154.39 = 20,011.50/x
  3. Step 3: Cross multiply
    66,758.67x = 100,154.39 × 20,011.50
  4. Step 4: Simplify right side
    66,758.67x = 2,004,239,475.43
  5. Step 5: Solve for x
    x = 2,004,239,475.43/66,758.67
  6. Step 6: Final answer
    x = 30,022.16

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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.