Home / 72,731.49-109,104.82-20,140.97

Finding the Fourth Proportional to 72,731.49, 109,104.82 and 20,140.97

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Solution

The fourth proportional to 72,731.49, 109,104.82 and 20,140.97 is: 30,213.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,731.49 : 109,104.82 = 20,140.97 : x
  2. Step 2: Convert to fraction form
    72,731.49/109,104.82 = 20,140.97/x
  3. Step 3: Cross multiply
    72,731.49x = 109,104.82 × 20,140.97
  4. Step 4: Simplify right side
    72,731.49x = 2,197,477,037.61
  5. Step 5: Solve for x
    x = 2,197,477,037.61/72,731.49
  6. Step 6: Final answer
    x = 30,213.56

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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.