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Finding the Fourth Proportional to 220,957.20, 331,489.80 and 102,603.60

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Solution

The fourth proportional to 220,957.20, 331,489.80 and 102,603.60 is: 153,930.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,957.20 : 331,489.80 = 102,603.60 : x
  2. Step 2: Convert to fraction form
    220,957.20/331,489.80 = 102,603.60/x
  3. Step 3: Cross multiply
    220,957.20x = 331,489.80 × 102,603.60
  4. Step 4: Simplify right side
    220,957.20x = 34,012,046,843.28
  5. Step 5: Solve for x
    x = 34,012,046,843.28/220,957.20
  6. Step 6: Final answer
    x = 153,930.48

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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.