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Finding the Fourth Proportional to 187.84, 258.88 and 136

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Solution

The fourth proportional to 187.84, 258.88 and 136 is: 187.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.84 : 258.88 = 136 : x
  2. Step 2: Convert to fraction form
    187.84/258.88 = 136/x
  3. Step 3: Cross multiply
    187.84x = 258.88 × 136
  4. Step 4: Simplify right side
    187.84x = 35,207.68
  5. Step 5: Solve for x
    x = 35,207.68/187.84
  6. Step 6: Final answer
    x = 187.43

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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.