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Finding the Fourth Proportional to 179.76, 248.05 and 137.79

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Solution

The fourth proportional to 179.76, 248.05 and 137.79 is: 190.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.76 : 248.05 = 137.79 : x
  2. Step 2: Convert to fraction form
    179.76/248.05 = 137.79/x
  3. Step 3: Cross multiply
    179.76x = 248.05 × 137.79
  4. Step 4: Simplify right side
    179.76x = 34,178.81
  5. Step 5: Solve for x
    x = 34,178.81/179.76
  6. Step 6: Final answer
    x = 190.14

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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.