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Finding the Fourth Proportional to 199.48, 275.28 and 125.80

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Solution

The fourth proportional to 199.48, 275.28 and 125.80 is: 173.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.48 : 275.28 = 125.80 : x
  2. Step 2: Convert to fraction form
    199.48/275.28 = 125.80/x
  3. Step 3: Cross multiply
    199.48x = 275.28 × 125.80
  4. Step 4: Simplify right side
    199.48x = 34,630.22
  5. Step 5: Solve for x
    x = 34,630.22/199.48
  6. Step 6: Final answer
    x = 173.60

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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.