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Finding the Fourth Proportional to 70,568.08, 105,828.63 and 20,651.02

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Solution

The fourth proportional to 70,568.08, 105,828.63 and 20,651.02 is: 30,969.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,568.08 : 105,828.63 = 20,651.02 : x
  2. Step 2: Convert to fraction form
    70,568.08/105,828.63 = 20,651.02/x
  3. Step 3: Cross multiply
    70,568.08x = 105,828.63 × 20,651.02
  4. Step 4: Simplify right side
    70,568.08x = 2,185,469,154.70
  5. Step 5: Solve for x
    x = 2,185,469,154.70/70,568.08
  6. Step 6: Final answer
    x = 30,969.66

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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.