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Finding the Fourth Proportional to 150.84, 226.32 and 138.72

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Solution

The fourth proportional to 150.84, 226.32 and 138.72 is: 208.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.84 : 226.32 = 138.72 : x
  2. Step 2: Convert to fraction form
    150.84/226.32 = 138.72/x
  3. Step 3: Cross multiply
    150.84x = 226.32 × 138.72
  4. Step 4: Simplify right side
    150.84x = 31,395.11
  5. Step 5: Solve for x
    x = 31,395.11/150.84
  6. Step 6: Final answer
    x = 208.14

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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.