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Finding the Fourth Proportional to 187.73, 259.05 and 117.80

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Solution

The fourth proportional to 187.73, 259.05 and 117.80 is: 162.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.73 : 259.05 = 117.80 : x
  2. Step 2: Convert to fraction form
    187.73/259.05 = 117.80/x
  3. Step 3: Cross multiply
    187.73x = 259.05 × 117.80
  4. Step 4: Simplify right side
    187.73x = 30,514.79
  5. Step 5: Solve for x
    x = 30,514.79/187.73
  6. Step 6: Final answer
    x = 162.55

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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.