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Finding the Fourth Proportional to 202.70, 279.96 and 137.10

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Solution

The fourth proportional to 202.70, 279.96 and 137.10 is: 189.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.70 : 279.96 = 137.10 : x
  2. Step 2: Convert to fraction form
    202.70/279.96 = 137.10/x
  3. Step 3: Cross multiply
    202.70x = 279.96 × 137.10
  4. Step 4: Simplify right side
    202.70x = 38,382.52
  5. Step 5: Solve for x
    x = 38,382.52/202.70
  6. Step 6: Final answer
    x = 189.36

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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.