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Finding the Fourth Proportional to 215,911.80, 323,714.10 and 82,740.60

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Solution

The fourth proportional to 215,911.80, 323,714.10 and 82,740.60 is: 124,052.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,911.80 : 323,714.10 = 82,740.60 : x
  2. Step 2: Convert to fraction form
    215,911.80/323,714.10 = 82,740.60/x
  3. Step 3: Cross multiply
    215,911.80x = 323,714.10 × 82,740.60
  4. Step 4: Simplify right side
    215,911.80x = 26,784,298,862.46
  5. Step 5: Solve for x
    x = 26,784,298,862.46/215,911.80
  6. Step 6: Final answer
    x = 124,052.04

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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.