Home / 99,530.18-149,217.42-67,861.70

Finding the Fourth Proportional to 99,530.18, 149,217.42 and 67,861.70

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Solution

The fourth proportional to 99,530.18, 149,217.42 and 67,861.70 is: 101,739.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,530.18 : 149,217.42 = 67,861.70 : x
  2. Step 2: Convert to fraction form
    99,530.18/149,217.42 = 67,861.70/x
  3. Step 3: Cross multiply
    99,530.18x = 149,217.42 × 67,861.70
  4. Step 4: Simplify right side
    99,530.18x = 10,126,147,790.81
  5. Step 5: Solve for x
    x = 10,126,147,790.81/99,530.18
  6. Step 6: Final answer
    x = 101,739.47

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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.