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Finding the Fourth Proportional to 117.86, 175.80 and 103.38

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Solution

The fourth proportional to 117.86, 175.80 and 103.38 is: 154.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.86 : 175.80 = 103.38 : x
  2. Step 2: Convert to fraction form
    117.86/175.80 = 103.38/x
  3. Step 3: Cross multiply
    117.86x = 175.80 × 103.38
  4. Step 4: Simplify right side
    117.86x = 18,173.93
  5. Step 5: Solve for x
    x = 18,173.93/117.86
  6. Step 6: Final answer
    x = 154.21

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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.