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Finding the Fourth Proportional to 166.96, 250.60 and 90.00

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Solution

The fourth proportional to 166.96, 250.60 and 90.00 is: 135.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.96 : 250.60 = 90.00 : x
  2. Step 2: Convert to fraction form
    166.96/250.60 = 90.00/x
  3. Step 3: Cross multiply
    166.96x = 250.60 × 90.00
  4. Step 4: Simplify right side
    166.96x = 22,554.65
  5. Step 5: Solve for x
    x = 22,554.65/166.96
  6. Step 6: Final answer
    x = 135.09

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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.