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Finding the Fourth Proportional to 108,865.20, 163,079.10 and 75,622.80

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Solution

The fourth proportional to 108,865.20, 163,079.10 and 75,622.80 is: 113,282.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,865.20 : 163,079.10 = 75,622.80 : x
  2. Step 2: Convert to fraction form
    108,865.20/163,079.10 = 75,622.80/x
  3. Step 3: Cross multiply
    108,865.20x = 163,079.10 × 75,622.80
  4. Step 4: Simplify right side
    108,865.20x = 12,332,498,163.48
  5. Step 5: Solve for x
    x = 12,332,498,163.48/108,865.20
  6. Step 6: Final answer
    x = 113,282.28

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1.5x scale

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.