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Finding the Fourth Proportional to 180.49, 248.92 and 139.15

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Solution

The fourth proportional to 180.49, 248.92 and 139.15 is: 191.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.49 : 248.92 = 139.15 : x
  2. Step 2: Convert to fraction form
    180.49/248.92 = 139.15/x
  3. Step 3: Cross multiply
    180.49x = 248.92 × 139.15
  4. Step 4: Simplify right side
    180.49x = 34,637.22
  5. Step 5: Solve for x
    x = 34,637.22/180.49
  6. Step 6: Final answer
    x = 191.91

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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.