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Finding the Fourth Proportional to 76.94, 115.31 and 59.76

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Solution

The fourth proportional to 76.94, 115.31 and 59.76 is: 89.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.94 : 115.31 = 59.76 : x
  2. Step 2: Convert to fraction form
    76.94/115.31 = 59.76/x
  3. Step 3: Cross multiply
    76.94x = 115.31 × 59.76
  4. Step 4: Simplify right side
    76.94x = 6,890.63
  5. Step 5: Solve for x
    x = 6,890.63/76.94
  6. Step 6: Final answer
    x = 89.56

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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.