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Finding the Fourth Proportional to 187.94, 259.35 and 103.92

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Solution

The fourth proportional to 187.94, 259.35 and 103.92 is: 143.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.94 : 259.35 = 103.92 : x
  2. Step 2: Convert to fraction form
    187.94/259.35 = 103.92/x
  3. Step 3: Cross multiply
    187.94x = 259.35 × 103.92
  4. Step 4: Simplify right side
    187.94x = 26,951.65
  5. Step 5: Solve for x
    x = 26,951.65/187.94
  6. Step 6: Final answer
    x = 143.41

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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.