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Finding the Fourth Proportional to 265,143.86, 397,778.07 and 87,650.85

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Solution

The fourth proportional to 265,143.86, 397,778.07 and 87,650.85 is: 131,496.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,143.86 : 397,778.07 = 87,650.85 : x
  2. Step 2: Convert to fraction form
    265,143.86/397,778.07 = 87,650.85/x
  3. Step 3: Cross multiply
    265,143.86x = 397,778.07 × 87,650.85
  4. Step 4: Simplify right side
    265,143.86x = 34,865,585,946.86
  5. Step 5: Solve for x
    x = 34,865,585,946.86/265,143.86
  6. Step 6: Final answer
    x = 131,496.87

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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.