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Finding the Fourth Proportional to 255,789.78, 383,719.68 and 87,264.86

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Solution

The fourth proportional to 255,789.78, 383,719.68 and 87,264.86 is: 130,909.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,789.78 : 383,719.68 = 87,264.86 : x
  2. Step 2: Convert to fraction form
    255,789.78/383,719.68 = 87,264.86/x
  3. Step 3: Cross multiply
    255,789.78x = 383,719.68 × 87,264.86
  4. Step 4: Simplify right side
    255,789.78x = 33,485,244,154.44
  5. Step 5: Solve for x
    x = 33,485,244,154.44/255,789.78
  6. Step 6: Final answer
    x = 130,909.23

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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.