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Finding the Fourth Proportional to 159,272.64, 219,785.76 and 91,288.80

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Solution

The fourth proportional to 159,272.64, 219,785.76 and 91,288.80 is: 125,972.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,272.64 : 219,785.76 = 91,288.80 : x
  2. Step 2: Convert to fraction form
    159,272.64/219,785.76 = 91,288.80/x
  3. Step 3: Cross multiply
    159,272.64x = 219,785.76 × 91,288.80
  4. Step 4: Simplify right side
    159,272.64x = 20,063,978,287.49
  5. Step 5: Solve for x
    x = 20,063,978,287.49/159,272.64
  6. Step 6: Final answer
    x = 125,972.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.