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Finding the Fourth Proportional to 202.36, 279.36 and 124.78

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Solution

The fourth proportional to 202.36, 279.36 and 124.78 is: 172.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.36 : 279.36 = 124.78 : x
  2. Step 2: Convert to fraction form
    202.36/279.36 = 124.78/x
  3. Step 3: Cross multiply
    202.36x = 279.36 × 124.78
  4. Step 4: Simplify right side
    202.36x = 34,858.54
  5. Step 5: Solve for x
    x = 34,858.54/202.36
  6. Step 6: Final answer
    x = 172.26

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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.