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Finding the Fourth Proportional to 59.95, 82.70 and 39.23

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Solution

The fourth proportional to 59.95, 82.70 and 39.23 is: 54.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.95 : 82.70 = 39.23 : x
  2. Step 2: Convert to fraction form
    59.95/82.70 = 39.23/x
  3. Step 3: Cross multiply
    59.95x = 82.70 × 39.23
  4. Step 4: Simplify right side
    59.95x = 3,244.52
  5. Step 5: Solve for x
    x = 3,244.52/59.95
  6. Step 6: Final answer
    x = 54.12

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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.