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Finding the Fourth Proportional to 117.21, 175.56 and 113.98

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Solution

The fourth proportional to 117.21, 175.56 and 113.98 is: 170.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.21 : 175.56 = 113.98 : x
  2. Step 2: Convert to fraction form
    117.21/175.56 = 113.98/x
  3. Step 3: Cross multiply
    117.21x = 175.56 × 113.98
  4. Step 4: Simplify right side
    117.21x = 20,009.89
  5. Step 5: Solve for x
    x = 20,009.89/117.21
  6. Step 6: Final answer
    x = 170.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.