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Finding the Fourth Proportional to 83.55, 125.26 and 56.46

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Solution

The fourth proportional to 83.55, 125.26 and 56.46 is: 84.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    83.55 : 125.26 = 56.46 : x
  2. Step 2: Convert to fraction form
    83.55/125.26 = 56.46/x
  3. Step 3: Cross multiply
    83.55x = 125.26 × 56.46
  4. Step 4: Simplify right side
    83.55x = 7,071.90
  5. Step 5: Solve for x
    x = 7,071.90/83.55
  6. Step 6: Final answer
    x = 84.64

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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.