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Finding the Fourth Proportional to 82,220, 123,330 and 26,816

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Solution

The fourth proportional to 82,220, 123,330 and 26,816 is: 40,224

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,220 : 123,330 = 26,816 : x
  2. Step 2: Convert to fraction form
    82,220/123,330 = 26,816/x
  3. Step 3: Cross multiply
    82,220x = 123,330 × 26,816
  4. Step 4: Simplify right side
    82,220x = 3,307,217,280
  5. Step 5: Solve for x
    x = 3,307,217,280/82,220
  6. Step 6: Final answer
    x = 40,224

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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.