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Finding the Fourth Proportional to 70,086.93, 105,146.49 and 20,167.44

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Solution

The fourth proportional to 70,086.93, 105,146.49 and 20,167.44 is: 30,255.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,086.93 : 105,146.49 = 20,167.44 : x
  2. Step 2: Convert to fraction form
    70,086.93/105,146.49 = 20,167.44/x
  3. Step 3: Cross multiply
    70,086.93x = 105,146.49 × 20,167.44
  4. Step 4: Simplify right side
    70,086.93x = 2,120,535,528.29
  5. Step 5: Solve for x
    x = 2,120,535,528.29/70,086.93
  6. Step 6: Final answer
    x = 30,255.79

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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.