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Finding the Fourth Proportional to 166.61, 229.86 and 117.53

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Solution

The fourth proportional to 166.61, 229.86 and 117.53 is: 162.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.61 : 229.86 = 117.53 : x
  2. Step 2: Convert to fraction form
    166.61/229.86 = 117.53/x
  3. Step 3: Cross multiply
    166.61x = 229.86 × 117.53
  4. Step 4: Simplify right side
    166.61x = 27,015.45
  5. Step 5: Solve for x
    x = 27,015.45/166.61
  6. Step 6: Final answer
    x = 162.15

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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.