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Finding the Fourth Proportional to 215,768.97, 323,641.76 and 66,009.29

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Solution

The fourth proportional to 215,768.97, 323,641.76 and 66,009.29 is: 99,010.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,768.97 : 323,641.76 = 66,009.29 : x
  2. Step 2: Convert to fraction form
    215,768.97/323,641.76 = 66,009.29/x
  3. Step 3: Cross multiply
    215,768.97x = 323,641.76 × 66,009.29
  4. Step 4: Simplify right side
    215,768.97x = 21,363,360,843.70
  5. Step 5: Solve for x
    x = 21,363,360,843.70/215,768.97
  6. Step 6: Final answer
    x = 99,010.35

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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.