Home / 67,161.86-100,708.11-19,770.81

Finding the Fourth Proportional to 67,161.86, 100,708.11 and 19,770.81

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Solution

The fourth proportional to 67,161.86, 100,708.11 and 19,770.81 is: 29,646.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,161.86 : 100,708.11 = 19,770.81 : x
  2. Step 2: Convert to fraction form
    67,161.86/100,708.11 = 19,770.81/x
  3. Step 3: Cross multiply
    67,161.86x = 100,708.11 × 19,770.81
  4. Step 4: Simplify right side
    67,161.86x = 1,991,080,813.86
  5. Step 5: Solve for x
    x = 1,991,080,813.86/67,161.86
  6. Step 6: Final answer
    x = 29,646.01

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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.