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Finding the Fourth Proportional to 69.51, 96.34 and 57.36

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Solution

The fourth proportional to 69.51, 96.34 and 57.36 is: 79.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.51 : 96.34 = 57.36 : x
  2. Step 2: Convert to fraction form
    69.51/96.34 = 57.36/x
  3. Step 3: Cross multiply
    69.51x = 96.34 × 57.36
  4. Step 4: Simplify right side
    69.51x = 5,525.85
  5. Step 5: Solve for x
    x = 5,525.85/69.51
  6. Step 6: Final answer
    x = 79.50

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.