Home / 129,707.11-178,993.42-73,118.53

Finding the Fourth Proportional to 129,707.11, 178,993.42 and 73,118.53

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Solution

The fourth proportional to 129,707.11, 178,993.42 and 73,118.53 is: 100,902.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,707.11 : 178,993.42 = 73,118.53 : x
  2. Step 2: Convert to fraction form
    129,707.11/178,993.42 = 73,118.53/x
  3. Step 3: Cross multiply
    129,707.11x = 178,993.42 × 73,118.53
  4. Step 4: Simplify right side
    129,707.11x = 13,087,735,750.07
  5. Step 5: Solve for x
    x = 13,087,735,750.07/129,707.11
  6. Step 6: Final answer
    x = 100,902.22

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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.