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Finding the Fourth Proportional to 323,788.39, 485,638.84 and 87,145.27

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Solution

The fourth proportional to 323,788.39, 485,638.84 and 87,145.27 is: 130,706.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,788.39 : 485,638.84 = 87,145.27 : x
  2. Step 2: Convert to fraction form
    323,788.39/485,638.84 = 87,145.27/x
  3. Step 3: Cross multiply
    323,788.39x = 485,638.84 × 87,145.27
  4. Step 4: Simplify right side
    323,788.39x = 42,321,126,729.12
  5. Step 5: Solve for x
    x = 42,321,126,729.12/323,788.39
  6. Step 6: Final answer
    x = 130,706.13

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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.