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Finding the Fourth Proportional to 180.16, 248.70 and 136.51

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Solution

The fourth proportional to 180.16, 248.70 and 136.51 is: 188.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.16 : 248.70 = 136.51 : x
  2. Step 2: Convert to fraction form
    180.16/248.70 = 136.51/x
  3. Step 3: Cross multiply
    180.16x = 248.70 × 136.51
  4. Step 4: Simplify right side
    180.16x = 33,950.04
  5. Step 5: Solve for x
    x = 33,950.04/180.16
  6. Step 6: Final answer
    x = 188.44

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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.