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Finding the Fourth Proportional to 82.07, 122.60 and 58.74

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Solution

The fourth proportional to 82.07, 122.60 and 58.74 is: 87.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.07 : 122.60 = 58.74 : x
  2. Step 2: Convert to fraction form
    82.07/122.60 = 58.74/x
  3. Step 3: Cross multiply
    82.07x = 122.60 × 58.74
  4. Step 4: Simplify right side
    82.07x = 7,201.91
  5. Step 5: Solve for x
    x = 7,201.91/82.07
  6. Step 6: Final answer
    x = 87.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.