Home / 81,700.86-122,561.73-29,115.66

Finding the Fourth Proportional to 81,700.86, 122,561.73 and 29,115.66

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Solution

The fourth proportional to 81,700.86, 122,561.73 and 29,115.66 is: 43,677.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,700.86 : 122,561.73 = 29,115.66 : x
  2. Step 2: Convert to fraction form
    81,700.86/122,561.73 = 29,115.66/x
  3. Step 3: Cross multiply
    81,700.86x = 122,561.73 × 29,115.66
  4. Step 4: Simplify right side
    81,700.86x = 3,568,465,659.69
  5. Step 5: Solve for x
    x = 3,568,465,659.69/81,700.86
  6. Step 6: Final answer
    x = 43,677.21

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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.