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Finding the Fourth Proportional to 69.21, 95.57 and 45.93

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Solution

The fourth proportional to 69.21, 95.57 and 45.93 is: 63.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.21 : 95.57 = 45.93 : x
  2. Step 2: Convert to fraction form
    69.21/95.57 = 45.93/x
  3. Step 3: Cross multiply
    69.21x = 95.57 × 45.93
  4. Step 4: Simplify right side
    69.21x = 4,389.30
  5. Step 5: Solve for x
    x = 4,389.30/69.21
  6. Step 6: Final answer
    x = 63.42

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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.