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Finding the Fourth Proportional to 100,375.70, 150,563.55 and 66,695.90

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Solution

The fourth proportional to 100,375.70, 150,563.55 and 66,695.90 is: 100,043.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,375.70 : 150,563.55 = 66,695.90 : x
  2. Step 2: Convert to fraction form
    100,375.70/150,563.55 = 66,695.90/x
  3. Step 3: Cross multiply
    100,375.70x = 150,563.55 × 66,695.90
  4. Step 4: Simplify right side
    100,375.70x = 10,041,971,474.45
  5. Step 5: Solve for x
    x = 10,041,971,474.45/100,375.70
  6. Step 6: Final answer
    x = 100,043.85

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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.