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Finding the Fourth Proportional to 180.92, 271.10 and 139.98

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Solution

The fourth proportional to 180.92, 271.10 and 139.98 is: 209.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.92 : 271.10 = 139.98 : x
  2. Step 2: Convert to fraction form
    180.92/271.10 = 139.98/x
  3. Step 3: Cross multiply
    180.92x = 271.10 × 139.98
  4. Step 4: Simplify right side
    180.92x = 37,948.58
  5. Step 5: Solve for x
    x = 37,948.58/180.92
  6. Step 6: Final answer
    x = 209.75

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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.