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Finding the Fourth Proportional to 70,629.27, 105,958.49 and 20,710.95

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Solution

The fourth proportional to 70,629.27, 105,958.49 and 20,710.95 is: 31,070.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,629.27 : 105,958.49 = 20,710.95 : x
  2. Step 2: Convert to fraction form
    70,629.27/105,958.49 = 20,710.95/x
  3. Step 3: Cross multiply
    70,629.27x = 105,958.49 × 20,710.95
  4. Step 4: Simplify right side
    70,629.27x = 2,194,500,884.91
  5. Step 5: Solve for x
    x = 2,194,500,884.91/70,629.27
  6. Step 6: Final answer
    x = 31,070.70

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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.