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Finding the Fourth Proportional to 137.32, 188.95 and 136.56

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Solution

The fourth proportional to 137.32, 188.95 and 136.56 is: 187.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.32 : 188.95 = 136.56 : x
  2. Step 2: Convert to fraction form
    137.32/188.95 = 136.56/x
  3. Step 3: Cross multiply
    137.32x = 188.95 × 136.56
  4. Step 4: Simplify right side
    137.32x = 25,803.01
  5. Step 5: Solve for x
    x = 25,803.01/137.32
  6. Step 6: Final answer
    x = 187.90

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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.