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Finding the Fourth Proportional to 215,749.72, 323,627.58 and 82,636.72

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Solution

The fourth proportional to 215,749.72, 323,627.58 and 82,636.72 is: 123,956.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,749.72 : 323,627.58 = 82,636.72 : x
  2. Step 2: Convert to fraction form
    215,749.72/323,627.58 = 82,636.72/x
  3. Step 3: Cross multiply
    215,749.72x = 323,627.58 × 82,636.72
  4. Step 4: Simplify right side
    215,749.72x = 26,743,521,712.74
  5. Step 5: Solve for x
    x = 26,743,521,712.74/215,749.72
  6. Step 6: Final answer
    x = 123,956.23

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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.