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Finding the Fourth Proportional to 77.01, 106.28 and 60.74

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Solution

The fourth proportional to 77.01, 106.28 and 60.74 is: 83.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.01 : 106.28 = 60.74 : x
  2. Step 2: Convert to fraction form
    77.01/106.28 = 60.74/x
  3. Step 3: Cross multiply
    77.01x = 106.28 × 60.74
  4. Step 4: Simplify right side
    77.01x = 6,455.45
  5. Step 5: Solve for x
    x = 6,455.45/77.01
  6. Step 6: Final answer
    x = 83.83

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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.