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Finding the Fourth Proportional to 141.37, 212.07 and 69.23

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Solution

The fourth proportional to 141.37, 212.07 and 69.23 is: 103.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.37 : 212.07 = 69.23 : x
  2. Step 2: Convert to fraction form
    141.37/212.07 = 69.23/x
  3. Step 3: Cross multiply
    141.37x = 212.07 × 69.23
  4. Step 4: Simplify right side
    141.37x = 14,681.61
  5. Step 5: Solve for x
    x = 14,681.61/141.37
  6. Step 6: Final answer
    x = 103.86

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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.