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Finding the Fourth Proportional to 121,243.53, 181,960.08 and 84,065.43

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Solution

The fourth proportional to 121,243.53, 181,960.08 and 84,065.43 is: 126,163.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,243.53 : 181,960.08 = 84,065.43 : x
  2. Step 2: Convert to fraction form
    121,243.53/181,960.08 = 84,065.43/x
  3. Step 3: Cross multiply
    121,243.53x = 181,960.08 × 84,065.43
  4. Step 4: Simplify right side
    121,243.53x = 15,296,552,368.03
  5. Step 5: Solve for x
    x = 15,296,552,368.03/121,243.53
  6. Step 6: Final answer
    x = 126,163.87

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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.