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Finding the Fourth Proportional to 199.19, 274.76 and 124.55

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Solution

The fourth proportional to 199.19, 274.76 and 124.55 is: 171.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.19 : 274.76 = 124.55 : x
  2. Step 2: Convert to fraction form
    199.19/274.76 = 124.55/x
  3. Step 3: Cross multiply
    199.19x = 274.76 × 124.55
  4. Step 4: Simplify right side
    199.19x = 34,219.98
  5. Step 5: Solve for x
    x = 34,219.98/199.19
  6. Step 6: Final answer
    x = 171.80

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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.