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Finding the Fourth Proportional to 160.59, 221.36 and 105.18

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Solution

The fourth proportional to 160.59, 221.36 and 105.18 is: 144.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.59 : 221.36 = 105.18 : x
  2. Step 2: Convert to fraction form
    160.59/221.36 = 105.18/x
  3. Step 3: Cross multiply
    160.59x = 221.36 × 105.18
  4. Step 4: Simplify right side
    160.59x = 23,282.12
  5. Step 5: Solve for x
    x = 23,282.12/160.59
  6. Step 6: Final answer
    x = 144.98

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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.