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Finding the Fourth Proportional to 152.10, 227.54 and 138.74

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Solution

The fourth proportional to 152.10, 227.54 and 138.74 is: 207.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.10 : 227.54 = 138.74 : x
  2. Step 2: Convert to fraction form
    152.10/227.54 = 138.74/x
  3. Step 3: Cross multiply
    152.10x = 227.54 × 138.74
  4. Step 4: Simplify right side
    152.10x = 31,568.11
  5. Step 5: Solve for x
    x = 31,568.11/152.10
  6. Step 6: Final answer
    x = 207.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.