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Finding the Fourth Proportional to 152.56, 227.85 and 138.08

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Solution

The fourth proportional to 152.56, 227.85 and 138.08 is: 206.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.56 : 227.85 = 138.08 : x
  2. Step 2: Convert to fraction form
    152.56/227.85 = 138.08/x
  3. Step 3: Cross multiply
    152.56x = 227.85 × 138.08
  4. Step 4: Simplify right side
    152.56x = 31,460.84
  5. Step 5: Solve for x
    x = 31,460.84/152.56
  6. Step 6: Final answer
    x = 206.23

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.