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Finding the Fourth Proportional to 60.45, 89.91 and 54.68

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Solution

The fourth proportional to 60.45, 89.91 and 54.68 is: 81.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.45 : 89.91 = 54.68 : x
  2. Step 2: Convert to fraction form
    60.45/89.91 = 54.68/x
  3. Step 3: Cross multiply
    60.45x = 89.91 × 54.68
  4. Step 4: Simplify right side
    60.45x = 4,915.83
  5. Step 5: Solve for x
    x = 4,915.83/60.45
  6. Step 6: Final answer
    x = 81.33

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.