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Finding the Fourth Proportional to 188.18, 259.84 and 118.34

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Solution

The fourth proportional to 188.18, 259.84 and 118.34 is: 163.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.18 : 259.84 = 118.34 : x
  2. Step 2: Convert to fraction form
    188.18/259.84 = 118.34/x
  3. Step 3: Cross multiply
    188.18x = 259.84 × 118.34
  4. Step 4: Simplify right side
    188.18x = 30,749.47
  5. Step 5: Solve for x
    x = 30,749.47/188.18
  6. Step 6: Final answer
    x = 163.40

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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.