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Finding the Fourth Proportional to 187.62, 258.91 and 108.95

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Solution

The fourth proportional to 187.62, 258.91 and 108.95 is: 150.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.62 : 258.91 = 108.95 : x
  2. Step 2: Convert to fraction form
    187.62/258.91 = 108.95/x
  3. Step 3: Cross multiply
    187.62x = 258.91 × 108.95
  4. Step 4: Simplify right side
    187.62x = 28,208.24
  5. Step 5: Solve for x
    x = 28,208.24/187.62
  6. Step 6: Final answer
    x = 150.35

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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.