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Finding the Fourth Proportional to 220,905.70, 331,358.55 and 80,646.10

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Solution

The fourth proportional to 220,905.70, 331,358.55 and 80,646.10 is: 120,969.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,905.70 : 331,358.55 = 80,646.10 : x
  2. Step 2: Convert to fraction form
    220,905.70/331,358.55 = 80,646.10/x
  3. Step 3: Cross multiply
    220,905.70x = 331,358.55 × 80,646.10
  4. Step 4: Simplify right side
    220,905.70x = 26,722,774,759.16
  5. Step 5: Solve for x
    x = 26,722,774,759.16/220,905.70
  6. Step 6: Final answer
    x = 120,969.15

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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.