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Finding the Fourth Proportional to 60.81, 83.89 and 48.55

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Solution

The fourth proportional to 60.81, 83.89 and 48.55 is: 66.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.81 : 83.89 = 48.55 : x
  2. Step 2: Convert to fraction form
    60.81/83.89 = 48.55/x
  3. Step 3: Cross multiply
    60.81x = 83.89 × 48.55
  4. Step 4: Simplify right side
    60.81x = 4,072.53
  5. Step 5: Solve for x
    x = 4,072.53/60.81
  6. Step 6: Final answer
    x = 66.97

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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.