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Finding the Fourth Proportional to 220,118.70, 330,178.05 and 79,859.10

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Solution

The fourth proportional to 220,118.70, 330,178.05 and 79,859.10 is: 119,788.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,118.70 : 330,178.05 = 79,859.10 : x
  2. Step 2: Convert to fraction form
    220,118.70/330,178.05 = 79,859.10/x
  3. Step 3: Cross multiply
    220,118.70x = 330,178.05 × 79,859.10
  4. Step 4: Simplify right side
    220,118.70x = 26,367,721,912.76
  5. Step 5: Solve for x
    x = 26,367,721,912.76/220,118.70
  6. Step 6: Final answer
    x = 119,788.65

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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.