Home / 99,861.20-149,964.60-53,205.20

Finding the Fourth Proportional to 99,861.20, 149,964.60 and 53,205.20

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Solution

The fourth proportional to 99,861.20, 149,964.60 and 53,205.20 is: 79,899.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,861.20 : 149,964.60 = 53,205.20 : x
  2. Step 2: Convert to fraction form
    99,861.20/149,964.60 = 53,205.20/x
  3. Step 3: Cross multiply
    99,861.20x = 149,964.60 × 53,205.20
  4. Step 4: Simplify right side
    99,861.20x = 7,978,896,535.92
  5. Step 5: Solve for x
    x = 7,978,896,535.92/99,861.20
  6. Step 6: Final answer
    x = 79,899.87

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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.