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Finding the Fourth Proportional to 108,559.92, 149,728.44 and 72,738.48

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Solution

The fourth proportional to 108,559.92, 149,728.44 and 72,738.48 is: 100,322.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,559.92 : 149,728.44 = 72,738.48 : x
  2. Step 2: Convert to fraction form
    108,559.92/149,728.44 = 72,738.48/x
  3. Step 3: Cross multiply
    108,559.92x = 149,728.44 × 72,738.48
  4. Step 4: Simplify right side
    108,559.92x = 10,891,019,138.37
  5. Step 5: Solve for x
    x = 10,891,019,138.37/108,559.92
  6. Step 6: Final answer
    x = 100,322.65

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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.