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Finding the Fourth Proportional to 159,242.53, 219,749.20 and 87,615.85

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Solution

The fourth proportional to 159,242.53, 219,749.20 and 87,615.85 is: 120,906.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,242.53 : 219,749.20 = 87,615.85 : x
  2. Step 2: Convert to fraction form
    159,242.53/219,749.20 = 87,615.85/x
  3. Step 3: Cross multiply
    159,242.53x = 219,749.20 × 87,615.85
  4. Step 4: Simplify right side
    159,242.53x = 19,253,512,944.82
  5. Step 5: Solve for x
    x = 19,253,512,944.82/159,242.53
  6. Step 6: Final answer
    x = 120,906.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.