Home / 120,835.20-181,166.40-54,220.80

Finding the Fourth Proportional to 120,835.20, 181,166.40 and 54,220.80

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Solution

The fourth proportional to 120,835.20, 181,166.40 and 54,220.80 is: 81,292.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,835.20 : 181,166.40 = 54,220.80 : x
  2. Step 2: Convert to fraction form
    120,835.20/181,166.40 = 54,220.80/x
  3. Step 3: Cross multiply
    120,835.20x = 181,166.40 × 54,220.80
  4. Step 4: Simplify right side
    120,835.20x = 9,822,987,141.12
  5. Step 5: Solve for x
    x = 9,822,987,141.12/120,835.20
  6. Step 6: Final answer
    x = 81,292.43

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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.