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Finding the Fourth Proportional to 120,892.40, 181,398.20 and 54,379.60

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Solution

The fourth proportional to 120,892.40, 181,398.20 and 54,379.60 is: 81,596.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,892.40 : 181,398.20 = 54,379.60 : x
  2. Step 2: Convert to fraction form
    120,892.40/181,398.20 = 54,379.60/x
  3. Step 3: Cross multiply
    120,892.40x = 181,398.20 × 54,379.60
  4. Step 4: Simplify right side
    120,892.40x = 9,864,361,556.72
  5. Step 5: Solve for x
    x = 9,864,361,556.72/120,892.40
  6. Step 6: Final answer
    x = 81,596.21

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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.