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Finding the Fourth Proportional to 69.37, 104.52 and 57.45

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Solution

The fourth proportional to 69.37, 104.52 and 57.45 is: 86.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    69.37 : 104.52 = 57.45 : x
  2. Step 2: Convert to fraction form
    69.37/104.52 = 57.45/x
  3. Step 3: Cross multiply
    69.37x = 104.52 × 57.45
  4. Step 4: Simplify right side
    69.37x = 6,004.93
  5. Step 5: Solve for x
    x = 6,004.93/69.37
  6. Step 6: Final answer
    x = 86.57

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.