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Finding the Fourth Proportional to 202.30, 279.21 and 137.02

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Solution

The fourth proportional to 202.30, 279.21 and 137.02 is: 189.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.30 : 279.21 = 137.02 : x
  2. Step 2: Convert to fraction form
    202.30/279.21 = 137.02/x
  3. Step 3: Cross multiply
    202.30x = 279.21 × 137.02
  4. Step 4: Simplify right side
    202.30x = 38,257.35
  5. Step 5: Solve for x
    x = 38,257.35/202.30
  6. Step 6: Final answer
    x = 189.11

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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.