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Finding the Fourth Proportional to 220,638.69, 330,961.68 and 106,720.29

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Solution

The fourth proportional to 220,638.69, 330,961.68 and 106,720.29 is: 160,082.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,638.69 : 330,961.68 = 106,720.29 : x
  2. Step 2: Convert to fraction form
    220,638.69/330,961.68 = 106,720.29/x
  3. Step 3: Cross multiply
    220,638.69x = 330,961.68 × 106,720.29
  4. Step 4: Simplify right side
    220,638.69x = 35,320,326,468.49
  5. Step 5: Solve for x
    x = 35,320,326,468.49/220,638.69
  6. Step 6: Final answer
    x = 160,082.20

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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.