Home / 73,006.20-109,509.30-66,439.80

Finding the Fourth Proportional to 73,006.20, 109,509.30 and 66,439.80

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Solution

The fourth proportional to 73,006.20, 109,509.30 and 66,439.80 is: 99,659.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,006.20 : 109,509.30 = 66,439.80 : x
  2. Step 2: Convert to fraction form
    73,006.20/109,509.30 = 66,439.80/x
  3. Step 3: Cross multiply
    73,006.20x = 109,509.30 × 66,439.80
  4. Step 4: Simplify right side
    73,006.20x = 7,275,775,990.14
  5. Step 5: Solve for x
    x = 7,275,775,990.14/73,006.20
  6. Step 6: Final answer
    x = 99,659.70

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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.