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Finding the Fourth Proportional to 160.20, 221.08 and 105.08

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Solution

The fourth proportional to 160.20, 221.08 and 105.08 is: 145.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.20 : 221.08 = 105.08 : x
  2. Step 2: Convert to fraction form
    160.20/221.08 = 105.08/x
  3. Step 3: Cross multiply
    160.20x = 221.08 × 105.08
  4. Step 4: Simplify right side
    160.20x = 23,230.82
  5. Step 5: Solve for x
    x = 23,230.82/160.20
  6. Step 6: Final answer
    x = 145.02

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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.