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Finding the Fourth Proportional to 74.80, 103.10 and 60.00

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Solution

The fourth proportional to 74.80, 103.10 and 60.00 is: 82.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.80 : 103.10 = 60.00 : x
  2. Step 2: Convert to fraction form
    74.80/103.10 = 60.00/x
  3. Step 3: Cross multiply
    74.80x = 103.10 × 60.00
  4. Step 4: Simplify right side
    74.80x = 6,186.21
  5. Step 5: Solve for x
    x = 6,186.21/74.80
  6. Step 6: Final answer
    x = 82.71

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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.