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Finding the Fourth Proportional to 220,613.70, 331,013.88 and 120,657.20

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Solution

The fourth proportional to 220,613.70, 331,013.88 and 120,657.20 is: 181,036.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,613.70 : 331,013.88 = 120,657.20 : x
  2. Step 2: Convert to fraction form
    220,613.70/331,013.88 = 120,657.20/x
  3. Step 3: Cross multiply
    220,613.70x = 331,013.88 × 120,657.20
  4. Step 4: Simplify right side
    220,613.70x = 39,939,207,921.94
  5. Step 5: Solve for x
    x = 39,939,207,921.94/220,613.70
  6. Step 6: Final answer
    x = 181,036.84

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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.