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Finding the Fourth Proportional to 255,795.78, 383,728.68 and 87,270.86

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Solution

The fourth proportional to 255,795.78, 383,728.68 and 87,270.86 is: 130,918.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,795.78 : 383,728.68 = 87,270.86 : x
  2. Step 2: Convert to fraction form
    255,795.78/383,728.68 = 87,270.86/x
  3. Step 3: Cross multiply
    255,795.78x = 383,728.68 × 87,270.86
  4. Step 4: Simplify right side
    255,795.78x = 33,488,331,910.26
  5. Step 5: Solve for x
    x = 33,488,331,910.26/255,795.78
  6. Step 6: Final answer
    x = 130,918.23

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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.