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Finding the Fourth Proportional to 202.19, 279.07 and 135.90

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Solution

The fourth proportional to 202.19, 279.07 and 135.90 is: 187.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.19 : 279.07 = 135.90 : x
  2. Step 2: Convert to fraction form
    202.19/279.07 = 135.90/x
  3. Step 3: Cross multiply
    202.19x = 279.07 × 135.90
  4. Step 4: Simplify right side
    202.19x = 37,925.61
  5. Step 5: Solve for x
    x = 37,925.61/202.19
  6. Step 6: Final answer
    x = 187.57

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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.