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Finding the Fourth Proportional to 180.13, 248.49 and 140.72

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Solution

The fourth proportional to 180.13, 248.49 and 140.72 is: 194.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.13 : 248.49 = 140.72 : x
  2. Step 2: Convert to fraction form
    180.13/248.49 = 140.72/x
  3. Step 3: Cross multiply
    180.13x = 248.49 × 140.72
  4. Step 4: Simplify right side
    180.13x = 34,967.51
  5. Step 5: Solve for x
    x = 34,967.51/180.13
  6. Step 6: Final answer
    x = 194.12

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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.