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Finding the Fourth Proportional to 160.28, 221.21 and 90.37

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Solution

The fourth proportional to 160.28, 221.21 and 90.37 is: 124.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.28 : 221.21 = 90.37 : x
  2. Step 2: Convert to fraction form
    160.28/221.21 = 90.37/x
  3. Step 3: Cross multiply
    160.28x = 221.21 × 90.37
  4. Step 4: Simplify right side
    160.28x = 19,990.75
  5. Step 5: Solve for x
    x = 19,990.75/160.28
  6. Step 6: Final answer
    x = 124.72

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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.