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Finding the Fourth Proportional to 147.72, 203.74 and 136.08

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Solution

The fourth proportional to 147.72, 203.74 and 136.08 is: 187.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    147.72 : 203.74 = 136.08 : x
  2. Step 2: Convert to fraction form
    147.72/203.74 = 136.08/x
  3. Step 3: Cross multiply
    147.72x = 203.74 × 136.08
  4. Step 4: Simplify right side
    147.72x = 27,724.94
  5. Step 5: Solve for x
    x = 27,724.94/147.72
  6. Step 6: Final answer
    x = 187.69

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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.