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Finding the Fourth Proportional to 137.40, 188.34 and 136.46

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Solution

The fourth proportional to 137.40, 188.34 and 136.46 is: 187.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.40 : 188.34 = 136.46 : x
  2. Step 2: Convert to fraction form
    137.40/188.34 = 136.46/x
  3. Step 3: Cross multiply
    137.40x = 188.34 × 136.46
  4. Step 4: Simplify right side
    137.40x = 25,699.93
  5. Step 5: Solve for x
    x = 25,699.93/137.40
  6. Step 6: Final answer
    x = 187.04

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.