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Finding the Fourth Proportional to 199.71, 275.63 and 112.41

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Solution

The fourth proportional to 199.71, 275.63 and 112.41 is: 155.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.71 : 275.63 = 112.41 : x
  2. Step 2: Convert to fraction form
    199.71/275.63 = 112.41/x
  3. Step 3: Cross multiply
    199.71x = 275.63 × 112.41
  4. Step 4: Simplify right side
    199.71x = 30,983.01
  5. Step 5: Solve for x
    x = 30,983.01/199.71
  6. Step 6: Final answer
    x = 155.14

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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.