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Finding the Fourth Proportional to 146.63, 202.19 and 138.94

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Solution

The fourth proportional to 146.63, 202.19 and 138.94 is: 191.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.63 : 202.19 = 138.94 : x
  2. Step 2: Convert to fraction form
    146.63/202.19 = 138.94/x
  3. Step 3: Cross multiply
    146.63x = 202.19 × 138.94
  4. Step 4: Simplify right side
    146.63x = 28,091.08
  5. Step 5: Solve for x
    x = 28,091.08/146.63
  6. Step 6: Final answer
    x = 191.57

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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.