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Finding the Fourth Proportional to 121,249.64, 181,903.71 and 38,143.64

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Solution

The fourth proportional to 121,249.64, 181,903.71 and 38,143.64 is: 57,224.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,249.64 : 181,903.71 = 38,143.64 : x
  2. Step 2: Convert to fraction form
    121,249.64/181,903.71 = 38,143.64/x
  3. Step 3: Cross multiply
    121,249.64x = 181,903.71 × 38,143.64
  4. Step 4: Simplify right side
    121,249.64x = 6,938,469,628.90
  5. Step 5: Solve for x
    x = 6,938,469,628.90/121,249.64
  6. Step 6: Final answer
    x = 57,224.66

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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.