Home / 129,163.35-193,709.89-81,707.21

Finding the Fourth Proportional to 129,163.35, 193,709.89 and 81,707.21

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Solution

The fourth proportional to 129,163.35, 193,709.89 and 81,707.21 is: 122,538.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,163.35 : 193,709.89 = 81,707.21 : x
  2. Step 2: Convert to fraction form
    129,163.35/193,709.89 = 81,707.21/x
  3. Step 3: Cross multiply
    129,163.35x = 193,709.89 × 81,707.21
  4. Step 4: Simplify right side
    129,163.35x = 15,827,493,284.22
  5. Step 5: Solve for x
    x = 15,827,493,284.22/129,163.35
  6. Step 6: Final answer
    x = 122,538.58

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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.