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Finding the Fourth Proportional to 200.70, 277.20 and 135.10

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Solution

The fourth proportional to 200.70, 277.20 and 135.10 is: 186.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.70 : 277.20 = 135.10 : x
  2. Step 2: Convert to fraction form
    200.70/277.20 = 135.10/x
  3. Step 3: Cross multiply
    200.70x = 277.20 × 135.10
  4. Step 4: Simplify right side
    200.70x = 37,449.72
  5. Step 5: Solve for x
    x = 37,449.72/200.70
  6. Step 6: Final answer
    x = 186.60

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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.