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Finding the Fourth Proportional to 215,821.80, 323,732.70 and 68,077.80

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Solution

The fourth proportional to 215,821.80, 323,732.70 and 68,077.80 is: 102,116.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,821.80 : 323,732.70 = 68,077.80 : x
  2. Step 2: Convert to fraction form
    215,821.80/323,732.70 = 68,077.80/x
  3. Step 3: Cross multiply
    215,821.80x = 323,732.70 × 68,077.80
  4. Step 4: Simplify right side
    215,821.80x = 22,039,010,004.06
  5. Step 5: Solve for x
    x = 22,039,010,004.06/215,821.80
  6. Step 6: Final answer
    x = 102,116.70

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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.