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Finding the Fourth Proportional to 60.39, 82.80 and 59.45

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Solution

The fourth proportional to 60.39, 82.80 and 59.45 is: 81.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.39 : 82.80 = 59.45 : x
  2. Step 2: Convert to fraction form
    60.39/82.80 = 59.45/x
  3. Step 3: Cross multiply
    60.39x = 82.80 × 59.45
  4. Step 4: Simplify right side
    60.39x = 4,922.05
  5. Step 5: Solve for x
    x = 4,922.05/60.39
  6. Step 6: Final answer
    x = 81.50

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.