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Finding the Fourth Proportional to 171.81, 236.61 and 147.24

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Solution

The fourth proportional to 171.81, 236.61 and 147.24 is: 202.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.81 : 236.61 = 147.24 : x
  2. Step 2: Convert to fraction form
    171.81/236.61 = 147.24/x
  3. Step 3: Cross multiply
    171.81x = 236.61 × 147.24
  4. Step 4: Simplify right side
    171.81x = 34,838.46
  5. Step 5: Solve for x
    x = 34,838.46/171.81
  6. Step 6: Final answer
    x = 202.77

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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.