Home / 99,697.38-149,616.21-90,168.75

Finding the Fourth Proportional to 99,697.38, 149,616.21 and 90,168.75

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Solution

The fourth proportional to 99,697.38, 149,616.21 and 90,168.75 is: 135,316.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,697.38 : 149,616.21 = 90,168.75 : x
  2. Step 2: Convert to fraction form
    99,697.38/149,616.21 = 90,168.75/x
  3. Step 3: Cross multiply
    99,697.38x = 149,616.21 × 90,168.75
  4. Step 4: Simplify right side
    99,697.38x = 13,490,706,635.44
  5. Step 5: Solve for x
    x = 13,490,706,635.44/99,697.38
  6. Step 6: Final answer
    x = 135,316.56

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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.