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Finding the Fourth Proportional to 60.62, 90.43 and 54.81

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Solution

The fourth proportional to 60.62, 90.43 and 54.81 is: 81.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.62 : 90.43 = 54.81 : x
  2. Step 2: Convert to fraction form
    60.62/90.43 = 54.81/x
  3. Step 3: Cross multiply
    60.62x = 90.43 × 54.81
  4. Step 4: Simplify right side
    60.62x = 4,956.33
  5. Step 5: Solve for x
    x = 4,956.33/60.62
  6. Step 6: Final answer
    x = 81.77

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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.