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Finding the Fourth Proportional to 171.81, 237.18 and 153.59

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Solution

The fourth proportional to 171.81, 237.18 and 153.59 is: 212.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.81 : 237.18 = 153.59 : x
  2. Step 2: Convert to fraction form
    171.81/237.18 = 153.59/x
  3. Step 3: Cross multiply
    171.81x = 237.18 × 153.59
  4. Step 4: Simplify right side
    171.81x = 36,427.29
  5. Step 5: Solve for x
    x = 36,427.29/171.81
  6. Step 6: Final answer
    x = 212.02

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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.