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Finding the Fourth Proportional to 160.20, 221.00 and 93.78

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Solution

The fourth proportional to 160.20, 221.00 and 93.78 is: 129.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.20 : 221.00 = 93.78 : x
  2. Step 2: Convert to fraction form
    160.20/221.00 = 93.78/x
  3. Step 3: Cross multiply
    160.20x = 221.00 × 93.78
  4. Step 4: Simplify right side
    160.20x = 20,724.91
  5. Step 5: Solve for x
    x = 20,724.91/160.20
  6. Step 6: Final answer
    x = 129.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.