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Finding the Fourth Proportional to 120,987.70, 181,481.55 and 36,747.70

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Solution

The fourth proportional to 120,987.70, 181,481.55 and 36,747.70 is: 55,121.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,987.70 : 181,481.55 = 36,747.70 : x
  2. Step 2: Convert to fraction form
    120,987.70/181,481.55 = 36,747.70/x
  3. Step 3: Cross multiply
    120,987.70x = 181,481.55 × 36,747.70
  4. Step 4: Simplify right side
    120,987.70x = 6,669,029,554.94
  5. Step 5: Solve for x
    x = 6,669,029,554.94/120,987.70
  6. Step 6: Final answer
    x = 55,121.55

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1.5x scale

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.