Home / 123,438.20-185,157.30-108,663.80

Finding the Fourth Proportional to 123,438.20, 185,157.30 and 108,663.80

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Solution

The fourth proportional to 123,438.20, 185,157.30 and 108,663.80 is: 162,995.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,438.20 : 185,157.30 = 108,663.80 : x
  2. Step 2: Convert to fraction form
    123,438.20/185,157.30 = 108,663.80/x
  3. Step 3: Cross multiply
    123,438.20x = 185,157.30 × 108,663.80
  4. Step 4: Simplify right side
    123,438.20x = 20,119,895,815.74
  5. Step 5: Solve for x
    x = 20,119,895,815.74/123,438.20
  6. Step 6: Final answer
    x = 162,995.70

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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.