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Finding the Fourth Proportional to 83.75, 125.62 and 45.23

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Solution

The fourth proportional to 83.75, 125.62 and 45.23 is: 67.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.75 : 125.62 = 45.23 : x
  2. Step 2: Convert to fraction form
    83.75/125.62 = 45.23/x
  3. Step 3: Cross multiply
    83.75x = 125.62 × 45.23
  4. Step 4: Simplify right side
    83.75x = 5,681.05
  5. Step 5: Solve for x
    x = 5,681.05/83.75
  6. Step 6: Final answer
    x = 67.84

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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.