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Finding the Fourth Proportional to 65.54, 98.72 and 60

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Solution

The fourth proportional to 65.54, 98.72 and 60 is: 90.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.54 : 98.72 = 60 : x
  2. Step 2: Convert to fraction form
    65.54/98.72 = 60/x
  3. Step 3: Cross multiply
    65.54x = 98.72 × 60
  4. Step 4: Simplify right side
    65.54x = 5,923.20
  5. Step 5: Solve for x
    x = 5,923.20/65.54
  6. Step 6: Final answer
    x = 90.38

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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.