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Finding the Fourth Proportional to 82.84, 124.08 and 58.72

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Solution

The fourth proportional to 82.84, 124.08 and 58.72 is: 87.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.84 : 124.08 = 58.72 : x
  2. Step 2: Convert to fraction form
    82.84/124.08 = 58.72/x
  3. Step 3: Cross multiply
    82.84x = 124.08 × 58.72
  4. Step 4: Simplify right side
    82.84x = 7,285.98
  5. Step 5: Solve for x
    x = 7,285.98/82.84
  6. Step 6: Final answer
    x = 87.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.