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Finding the Fourth Proportional to 108,560.92, 149,729.82 and 72,739.48

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Solution

The fourth proportional to 108,560.92, 149,729.82 and 72,739.48 is: 100,324.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,560.92 : 149,729.82 = 72,739.48 : x
  2. Step 2: Convert to fraction form
    108,560.92/149,729.82 = 72,739.48/x
  3. Step 3: Cross multiply
    108,560.92x = 149,729.82 × 72,739.48
  4. Step 4: Simplify right side
    108,560.92x = 10,891,269,247.29
  5. Step 5: Solve for x
    x = 10,891,269,247.29/108,560.92
  6. Step 6: Final answer
    x = 100,324.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.