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Finding the Fourth Proportional to 171.81, 257.67 and 117.99

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Solution

The fourth proportional to 171.81, 257.67 and 117.99 is: 176.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.81 : 257.67 = 117.99 : x
  2. Step 2: Convert to fraction form
    171.81/257.67 = 117.99/x
  3. Step 3: Cross multiply
    171.81x = 257.67 × 117.99
  4. Step 4: Simplify right side
    171.81x = 30,402.48
  5. Step 5: Solve for x
    x = 30,402.48/171.81
  6. Step 6: Final answer
    x = 176.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.