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Finding the Fourth Proportional to 60.81, 84.48 and 59.79

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Solution

The fourth proportional to 60.81, 84.48 and 59.79 is: 83.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.81 : 84.48 = 59.79 : x
  2. Step 2: Convert to fraction form
    60.81/84.48 = 59.79/x
  3. Step 3: Cross multiply
    60.81x = 84.48 × 59.79
  4. Step 4: Simplify right side
    60.81x = 5,051.06
  5. Step 5: Solve for x
    x = 5,051.06/60.81
  6. Step 6: Final answer
    x = 83.06

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.