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Finding the Fourth Proportional to 220,115.20, 330,172.80 and 141,383.20

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Solution

The fourth proportional to 220,115.20, 330,172.80 and 141,383.20 is: 212,074.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,115.20 : 330,172.80 = 141,383.20 : x
  2. Step 2: Convert to fraction form
    220,115.20/330,172.80 = 141,383.20/x
  3. Step 3: Cross multiply
    220,115.20x = 330,172.80 × 141,383.20
  4. Step 4: Simplify right side
    220,115.20x = 46,680,887,016.96
  5. Step 5: Solve for x
    x = 46,680,887,016.96/220,115.20
  6. Step 6: Final answer
    x = 212,074.80

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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.