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Finding the Fourth Proportional to 72,017.20, 108,025.80 and 68,736.70

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Solution

The fourth proportional to 72,017.20, 108,025.80 and 68,736.70 is: 103,105.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,017.20 : 108,025.80 = 68,736.70 : x
  2. Step 2: Convert to fraction form
    72,017.20/108,025.80 = 68,736.70/x
  3. Step 3: Cross multiply
    72,017.20x = 108,025.80 × 68,736.70
  4. Step 4: Simplify right side
    72,017.20x = 7,425,337,006.86
  5. Step 5: Solve for x
    x = 7,425,337,006.86/72,017.20
  6. Step 6: Final answer
    x = 103,105.05

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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.