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Finding the Fourth Proportional to 215,706.92, 323,664.94 and 87,620.04

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Solution

The fourth proportional to 215,706.92, 323,664.94 and 87,620.04 is: 131,472.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,706.92 : 323,664.94 = 87,620.04 : x
  2. Step 2: Convert to fraction form
    215,706.92/323,664.94 = 87,620.04/x
  3. Step 3: Cross multiply
    215,706.92x = 323,664.94 × 87,620.04
  4. Step 4: Simplify right side
    215,706.92x = 28,359,534,989.40
  5. Step 5: Solve for x
    x = 28,359,534,989.40/215,706.92
  6. Step 6: Final answer
    x = 131,472.53

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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.