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Finding the Fourth Proportional to 180.17, 248.67 and 113.81

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Solution

The fourth proportional to 180.17, 248.67 and 113.81 is: 157.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.17 : 248.67 = 113.81 : x
  2. Step 2: Convert to fraction form
    180.17/248.67 = 113.81/x
  3. Step 3: Cross multiply
    180.17x = 248.67 × 113.81
  4. Step 4: Simplify right side
    180.17x = 28,301.13
  5. Step 5: Solve for x
    x = 28,301.13/180.17
  6. Step 6: Final answer
    x = 157.08

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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.