Home / 72,747.86-109,121.58-20,157.39

Finding the Fourth Proportional to 72,747.86, 109,121.58 and 20,157.39

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Solution

The fourth proportional to 72,747.86, 109,121.58 and 20,157.39 is: 30,236.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,747.86 : 109,121.58 = 20,157.39 : x
  2. Step 2: Convert to fraction form
    72,747.86/109,121.58 = 20,157.39/x
  3. Step 3: Cross multiply
    72,747.86x = 109,121.58 × 20,157.39
  4. Step 4: Simplify right side
    72,747.86x = 2,199,606,245.48
  5. Step 5: Solve for x
    x = 2,199,606,245.48/72,747.86
  6. Step 6: Final answer
    x = 30,236.03

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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.