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Finding the Fourth Proportional to 160.09, 220.34 and 136.70

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Solution

The fourth proportional to 160.09, 220.34 and 136.70 is: 188.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    160.09 : 220.34 = 136.70 : x
  2. Step 2: Convert to fraction form
    160.09/220.34 = 136.70/x
  3. Step 3: Cross multiply
    160.09x = 220.34 × 136.70
  4. Step 4: Simplify right side
    160.09x = 30,119.72
  5. Step 5: Solve for x
    x = 30,119.72/160.09
  6. Step 6: Final answer
    x = 188.15

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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.