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Finding the Fourth Proportional to 69.57, 104.18 and 58.64

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Solution

The fourth proportional to 69.57, 104.18 and 58.64 is: 87.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.57 : 104.18 = 58.64 : x
  2. Step 2: Convert to fraction form
    69.57/104.18 = 58.64/x
  3. Step 3: Cross multiply
    69.57x = 104.18 × 58.64
  4. Step 4: Simplify right side
    69.57x = 6,108.30
  5. Step 5: Solve for x
    x = 6,108.30/69.57
  6. Step 6: Final answer
    x = 87.80

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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.