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Finding the Fourth Proportional to 137.98, 188.48 and 137.08

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Solution

The fourth proportional to 137.98, 188.48 and 137.08 is: 187.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.98 : 188.48 = 137.08 : x
  2. Step 2: Convert to fraction form
    137.98/188.48 = 137.08/x
  3. Step 3: Cross multiply
    137.98x = 188.48 × 137.08
  4. Step 4: Simplify right side
    137.98x = 25,836.84
  5. Step 5: Solve for x
    x = 25,836.84/137.98
  6. Step 6: Final answer
    x = 187.25

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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.