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Finding the Fourth Proportional to 255,790.78, 383,721.18 and 87,265.86

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Solution

The fourth proportional to 255,790.78, 383,721.18 and 87,265.86 is: 130,910.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,790.78 : 383,721.18 = 87,265.86 : x
  2. Step 2: Convert to fraction form
    255,790.78/383,721.18 = 87,265.86/x
  3. Step 3: Cross multiply
    255,790.78x = 383,721.18 × 87,265.86
  4. Step 4: Simplify right side
    255,790.78x = 33,485,758,772.91
  5. Step 5: Solve for x
    x = 33,485,758,772.91/255,790.78
  6. Step 6: Final answer
    x = 130,910.73

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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.