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Finding the Fourth Proportional to 166.02, 248.72 and 139.08

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Solution

The fourth proportional to 166.02, 248.72 and 139.08 is: 208.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.02 : 248.72 = 139.08 : x
  2. Step 2: Convert to fraction form
    166.02/248.72 = 139.08/x
  3. Step 3: Cross multiply
    166.02x = 248.72 × 139.08
  4. Step 4: Simplify right side
    166.02x = 34,591.28
  5. Step 5: Solve for x
    x = 34,591.28/166.02
  6. Step 6: Final answer
    x = 208.36

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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.