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Finding the Fourth Proportional to 166.70, 230.10 and 120.12

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Solution

The fourth proportional to 166.70, 230.10 and 120.12 is: 165.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.70 : 230.10 = 120.12 : x
  2. Step 2: Convert to fraction form
    166.70/230.10 = 120.12/x
  3. Step 3: Cross multiply
    166.70x = 230.10 × 120.12
  4. Step 4: Simplify right side
    166.70x = 27,639.61
  5. Step 5: Solve for x
    x = 27,639.61/166.70
  6. Step 6: Final answer
    x = 165.80

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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.