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Finding the Fourth Proportional to 99,699.38, 149,619.22 and 90,170.76

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Solution

The fourth proportional to 99,699.38, 149,619.22 and 90,170.76 is: 135,319.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,699.38 : 149,619.22 = 90,170.76 : x
  2. Step 2: Convert to fraction form
    99,699.38/149,619.22 = 90,170.76/x
  3. Step 3: Cross multiply
    99,699.38x = 149,619.22 × 90,170.76
  4. Step 4: Simplify right side
    99,699.38x = 13,491,278,778.01
  5. Step 5: Solve for x
    x = 13,491,278,778.01/99,699.38
  6. Step 6: Final answer
    x = 135,319.59

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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.