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Finding the Fourth Proportional to 200.13, 276.18 and 112.80

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Solution

The fourth proportional to 200.13, 276.18 and 112.80 is: 155.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.13 : 276.18 = 112.80 : x
  2. Step 2: Convert to fraction form
    200.13/276.18 = 112.80/x
  3. Step 3: Cross multiply
    200.13x = 276.18 × 112.80
  4. Step 4: Simplify right side
    200.13x = 31,151.16
  5. Step 5: Solve for x
    x = 31,151.16/200.13
  6. Step 6: Final answer
    x = 155.66

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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.