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Finding the Fourth Proportional to 114.86, 158.42 and 76

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Solution

The fourth proportional to 114.86, 158.42 and 76 is: 104.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.86 : 158.42 = 76 : x
  2. Step 2: Convert to fraction form
    114.86/158.42 = 76/x
  3. Step 3: Cross multiply
    114.86x = 158.42 × 76
  4. Step 4: Simplify right side
    114.86x = 12,039.92
  5. Step 5: Solve for x
    x = 12,039.92/114.86
  6. Step 6: Final answer
    x = 104.82

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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.