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Finding the Fourth Proportional to 133.86, 199.80 and 117.66

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Solution

The fourth proportional to 133.86, 199.80 and 117.66 is: 175.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.86 : 199.80 = 117.66 : x
  2. Step 2: Convert to fraction form
    133.86/199.80 = 117.66/x
  3. Step 3: Cross multiply
    133.86x = 199.80 × 117.66
  4. Step 4: Simplify right side
    133.86x = 23,508.47
  5. Step 5: Solve for x
    x = 23,508.47/133.86
  6. Step 6: Final answer
    x = 175.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.