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Finding the Fourth Proportional to 220,164.80, 330,143.11 and 85,292.03

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Solution

The fourth proportional to 220,164.80, 330,143.11 and 85,292.03 is: 127,897.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,164.80 : 330,143.11 = 85,292.03 : x
  2. Step 2: Convert to fraction form
    220,164.80/330,143.11 = 85,292.03/x
  3. Step 3: Cross multiply
    220,164.80x = 330,143.11 × 85,292.03
  4. Step 4: Simplify right side
    220,164.80x = 28,158,576,654.54
  5. Step 5: Solve for x
    x = 28,158,576,654.54/220,164.80
  6. Step 6: Final answer
    x = 127,897.73

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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.