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Finding the Fourth Proportional to 220,758.65, 331,106.85 and 70,979.90

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Solution

The fourth proportional to 220,758.65, 331,106.85 and 70,979.90 is: 106,459.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,758.65 : 331,106.85 = 70,979.90 : x
  2. Step 2: Convert to fraction form
    220,758.65/331,106.85 = 70,979.90/x
  3. Step 3: Cross multiply
    220,758.65x = 331,106.85 × 70,979.90
  4. Step 4: Simplify right side
    220,758.65x = 23,501,929,446.78
  5. Step 5: Solve for x
    x = 23,501,929,446.78/220,758.65
  6. Step 6: Final answer
    x = 106,459.84

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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.