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Finding the Fourth Proportional to 70,717.69, 106,060.11 and 20,784.43

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Solution

The fourth proportional to 70,717.69, 106,060.11 and 20,784.43 is: 31,171.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,717.69 : 106,060.11 = 20,784.43 : x
  2. Step 2: Convert to fraction form
    70,717.69/106,060.11 = 20,784.43/x
  3. Step 3: Cross multiply
    70,717.69x = 106,060.11 × 20,784.43
  4. Step 4: Simplify right side
    70,717.69x = 2,204,398,932.09
  5. Step 5: Solve for x
    x = 2,204,398,932.09/70,717.69
  6. Step 6: Final answer
    x = 31,171.82

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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.