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Finding the Fourth Proportional to 159,785.78, 220,504.15 and 88,165.78

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Solution

The fourth proportional to 159,785.78, 220,504.15 and 88,165.78 is: 121,668.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,785.78 : 220,504.15 = 88,165.78 : x
  2. Step 2: Convert to fraction form
    159,785.78/220,504.15 = 88,165.78/x
  3. Step 3: Cross multiply
    159,785.78x = 220,504.15 × 88,165.78
  4. Step 4: Simplify right side
    159,785.78x = 19,440,919,936.93
  5. Step 5: Solve for x
    x = 19,440,919,936.93/159,785.78
  6. Step 6: Final answer
    x = 121,668.65

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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.