Home / 123,421.11-170,317.68-73,120.11

Finding the Fourth Proportional to 123,421.11, 170,317.68 and 73,120.11

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Solution

The fourth proportional to 123,421.11, 170,317.68 and 73,120.11 is: 100,903.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,421.11 : 170,317.68 = 73,120.11 : x
  2. Step 2: Convert to fraction form
    123,421.11/170,317.68 = 73,120.11/x
  3. Step 3: Cross multiply
    123,421.11x = 170,317.68 × 73,120.11
  4. Step 4: Simplify right side
    123,421.11x = 12,453,647,496.54
  5. Step 5: Solve for x
    x = 12,453,647,496.54/123,421.11
  6. Step 6: Final answer
    x = 100,903.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.