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Finding the Fourth Proportional to 120,996.60, 181,396.82 and 54,387.96

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Solution

The fourth proportional to 120,996.60, 181,396.82 and 54,387.96 is: 81,537.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,996.60 : 181,396.82 = 54,387.96 : x
  2. Step 2: Convert to fraction form
    120,996.60/181,396.82 = 54,387.96/x
  3. Step 3: Cross multiply
    120,996.60x = 181,396.82 × 54,387.96
  4. Step 4: Simplify right side
    120,996.60x = 9,865,802,990.29
  5. Step 5: Solve for x
    x = 9,865,802,990.29/120,996.60
  6. Step 6: Final answer
    x = 81,537.85

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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.