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Finding the Fourth Proportional to 157.95, 217.49 and 118.67

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Solution

The fourth proportional to 157.95, 217.49 and 118.67 is: 163.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.95 : 217.49 = 118.67 : x
  2. Step 2: Convert to fraction form
    157.95/217.49 = 118.67/x
  3. Step 3: Cross multiply
    157.95x = 217.49 × 118.67
  4. Step 4: Simplify right side
    157.95x = 25,807.86
  5. Step 5: Solve for x
    x = 25,807.86/157.95
  6. Step 6: Final answer
    x = 163.39

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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.