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Finding the Fourth Proportional to 76.36, 113.50 and 74.34

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Solution

The fourth proportional to 76.36, 113.50 and 74.34 is: 110.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    76.36 : 113.50 = 74.34 : x
  2. Step 2: Convert to fraction form
    76.36/113.50 = 74.34/x
  3. Step 3: Cross multiply
    76.36x = 113.50 × 74.34
  4. Step 4: Simplify right side
    76.36x = 8,437.59
  5. Step 5: Solve for x
    x = 8,437.59/76.36
  6. Step 6: Final answer
    x = 110.50

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.