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Finding the Fourth Proportional to 215,843.20, 323,764.80 and 122,531.20

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Solution

The fourth proportional to 215,843.20, 323,764.80 and 122,531.20 is: 183,796.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,843.20 : 323,764.80 = 122,531.20 : x
  2. Step 2: Convert to fraction form
    215,843.20/323,764.80 = 122,531.20/x
  3. Step 3: Cross multiply
    215,843.20x = 323,764.80 × 122,531.20
  4. Step 4: Simplify right side
    215,843.20x = 39,671,289,461.76
  5. Step 5: Solve for x
    x = 39,671,289,461.76/215,843.20
  6. Step 6: Final answer
    x = 183,796.80

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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.