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Finding the Fourth Proportional to 68.75, 94.77 and 60.55

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Solution

The fourth proportional to 68.75, 94.77 and 60.55 is: 83.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.75 : 94.77 = 60.55 : x
  2. Step 2: Convert to fraction form
    68.75/94.77 = 60.55/x
  3. Step 3: Cross multiply
    68.75x = 94.77 × 60.55
  4. Step 4: Simplify right side
    68.75x = 5,738.32
  5. Step 5: Solve for x
    x = 5,738.32/68.75
  6. Step 6: Final answer
    x = 83.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.