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Finding the Fourth Proportional to 188.99, 261.05 and 133.91

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Solution

The fourth proportional to 188.99, 261.05 and 133.91 is: 184.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.99 : 261.05 = 133.91 : x
  2. Step 2: Convert to fraction form
    188.99/261.05 = 133.91/x
  3. Step 3: Cross multiply
    188.99x = 261.05 × 133.91
  4. Step 4: Simplify right side
    188.99x = 34,955.23
  5. Step 5: Solve for x
    x = 34,955.23/188.99
  6. Step 6: Final answer
    x = 184.96

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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.