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Finding the Fourth Proportional to 159,243.57, 219,749.76 and 87,615.68

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Solution

The fourth proportional to 159,243.57, 219,749.76 and 87,615.68 is: 120,906.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,243.57 : 219,749.76 = 87,615.68 : x
  2. Step 2: Convert to fraction form
    159,243.57/219,749.76 = 87,615.68/x
  3. Step 3: Cross multiply
    159,243.57x = 219,749.76 × 87,615.68
  4. Step 4: Simplify right side
    159,243.57x = 19,253,523,553.49
  5. Step 5: Solve for x
    x = 19,253,523,553.49/159,243.57
  6. Step 6: Final answer
    x = 120,906.13

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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.