Home / 72,747.68-109,123.23-20,157.62

Finding the Fourth Proportional to 72,747.68, 109,123.23 and 20,157.62

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Solution

The fourth proportional to 72,747.68, 109,123.23 and 20,157.62 is: 30,236.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,747.68 : 109,123.23 = 20,157.62 : x
  2. Step 2: Convert to fraction form
    72,747.68/109,123.23 = 20,157.62/x
  3. Step 3: Cross multiply
    72,747.68x = 109,123.23 × 20,157.62
  4. Step 4: Simplify right side
    72,747.68x = 2,199,664,057.90
  5. Step 5: Solve for x
    x = 2,199,664,057.90/72,747.68
  6. Step 6: Final answer
    x = 30,236.90

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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.