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Finding the Fourth Proportional to 180.36, 248.55 and 131.16

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Solution

The fourth proportional to 180.36, 248.55 and 131.16 is: 180.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.36 : 248.55 = 131.16 : x
  2. Step 2: Convert to fraction form
    180.36/248.55 = 131.16/x
  3. Step 3: Cross multiply
    180.36x = 248.55 × 131.16
  4. Step 4: Simplify right side
    180.36x = 32,599.82
  5. Step 5: Solve for x
    x = 32,599.82/180.36
  6. Step 6: Final answer
    x = 180.75

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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.