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Finding the Fourth Proportional to 200.13, 276.07 and 117.21

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Solution

The fourth proportional to 200.13, 276.07 and 117.21 is: 161.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.13 : 276.07 = 117.21 : x
  2. Step 2: Convert to fraction form
    200.13/276.07 = 117.21/x
  3. Step 3: Cross multiply
    200.13x = 276.07 × 117.21
  4. Step 4: Simplify right side
    200.13x = 32,358.16
  5. Step 5: Solve for x
    x = 32,358.16/200.13
  6. Step 6: Final answer
    x = 161.69

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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.