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Finding the Fourth Proportional to 82.62, 124.43 and 72.06

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Solution

The fourth proportional to 82.62, 124.43 and 72.06 is: 108.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.62 : 124.43 = 72.06 : x
  2. Step 2: Convert to fraction form
    82.62/124.43 = 72.06/x
  3. Step 3: Cross multiply
    82.62x = 124.43 × 72.06
  4. Step 4: Simplify right side
    82.62x = 8,966.07
  5. Step 5: Solve for x
    x = 8,966.07/82.62
  6. Step 6: Final answer
    x = 108.52

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.