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Finding the Fourth Proportional to 136.90, 187.58 and 135.82

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Solution

The fourth proportional to 136.90, 187.58 and 135.82 is: 186.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    136.90 : 187.58 = 135.82 : x
  2. Step 2: Convert to fraction form
    136.90/187.58 = 135.82/x
  3. Step 3: Cross multiply
    136.90x = 187.58 × 135.82
  4. Step 4: Simplify right side
    136.90x = 25,477.12
  5. Step 5: Solve for x
    x = 25,477.12/136.90
  6. Step 6: Final answer
    x = 186.10

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.