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Finding the Fourth Proportional to 70,836.92, 106,238.36 and 20,903.52

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Solution

The fourth proportional to 70,836.92, 106,238.36 and 20,903.52 is: 31,350.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,836.92 : 106,238.36 = 20,903.52 : x
  2. Step 2: Convert to fraction form
    70,836.92/106,238.36 = 20,903.52/x
  3. Step 3: Cross multiply
    70,836.92x = 106,238.36 × 20,903.52
  4. Step 4: Simplify right side
    70,836.92x = 2,220,755,683.03
  5. Step 5: Solve for x
    x = 2,220,755,683.03/70,836.92
  6. Step 6: Final answer
    x = 31,350.26

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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.