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Finding the Fourth Proportional to 255,755.28, 383,365.38 and 87,216.60

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Solution

The fourth proportional to 255,755.28, 383,365.38 and 87,216.60 is: 130,733.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,755.28 : 383,365.38 = 87,216.60 : x
  2. Step 2: Convert to fraction form
    255,755.28/383,365.38 = 87,216.60/x
  3. Step 3: Cross multiply
    255,755.28x = 383,365.38 × 87,216.60
  4. Step 4: Simplify right side
    255,755.28x = 33,435,825,001.31
  5. Step 5: Solve for x
    x = 33,435,825,001.31/255,755.28
  6. Step 6: Final answer
    x = 130,733.66

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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.