Home / 220,961.60-331,490.40-80,720

Finding the Fourth Proportional to 220,961.60, 331,490.40 and 80,720

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Solution

The fourth proportional to 220,961.60, 331,490.40 and 80,720 is: 121,097.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,961.60 : 331,490.40 = 80,720 : x
  2. Step 2: Convert to fraction form
    220,961.60/331,490.40 = 80,720/x
  3. Step 3: Cross multiply
    220,961.60x = 331,490.40 × 80,720
  4. Step 4: Simplify right side
    220,961.60x = 26,757,905,088
  5. Step 5: Solve for x
    x = 26,757,905,088/220,961.60
  6. Step 6: Final answer
    x = 121,097.53

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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.