Home / 120,905.20-181,012.20-108,463.60

Finding the Fourth Proportional to 120,905.20, 181,012.20 and 108,463.60

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Solution

The fourth proportional to 120,905.20, 181,012.20 and 108,463.60 is: 162,385.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,905.20 : 181,012.20 = 108,463.60 : x
  2. Step 2: Convert to fraction form
    120,905.20/181,012.20 = 108,463.60/x
  3. Step 3: Cross multiply
    120,905.20x = 181,012.20 × 108,463.60
  4. Step 4: Simplify right side
    120,905.20x = 19,633,234,855.92
  5. Step 5: Solve for x
    x = 19,633,234,855.92/120,905.20
  6. Step 6: Final answer
    x = 162,385.36

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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.