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Finding the Fourth Proportional to 67,287.64, 100,947.42 and 20,537.56

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Solution

The fourth proportional to 67,287.64, 100,947.42 and 20,537.56 is: 30,811.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,287.64 : 100,947.42 = 20,537.56 : x
  2. Step 2: Convert to fraction form
    67,287.64/100,947.42 = 20,537.56/x
  3. Step 3: Cross multiply
    67,287.64x = 100,947.42 × 20,537.56
  4. Step 4: Simplify right side
    67,287.64x = 2,073,213,695.10
  5. Step 5: Solve for x
    x = 2,073,213,695.10/67,287.64
  6. Step 6: Final answer
    x = 30,811.21

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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.