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Finding the Fourth Proportional to 202.20, 278.94 and 124.56

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Solution

The fourth proportional to 202.20, 278.94 and 124.56 is: 171.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.20 : 278.94 = 124.56 : x
  2. Step 2: Convert to fraction form
    202.20/278.94 = 124.56/x
  3. Step 3: Cross multiply
    202.20x = 278.94 × 124.56
  4. Step 4: Simplify right side
    202.20x = 34,744.77
  5. Step 5: Solve for x
    x = 34,744.77/202.20
  6. Step 6: Final answer
    x = 171.83

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.