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Finding the Fourth Proportional to 117.12, 175.34 and 65.67

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Solution

The fourth proportional to 117.12, 175.34 and 65.67 is: 98.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.12 : 175.34 = 65.67 : x
  2. Step 2: Convert to fraction form
    117.12/175.34 = 65.67/x
  3. Step 3: Cross multiply
    117.12x = 175.34 × 65.67
  4. Step 4: Simplify right side
    117.12x = 11,513.87
  5. Step 5: Solve for x
    x = 11,513.87/117.12
  6. Step 6: Final answer
    x = 98.31

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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.