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Finding the Fourth Proportional to 121,763.01, 168,039.33 and 73,380.09

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Solution

The fourth proportional to 121,763.01, 168,039.33 and 73,380.09 is: 101,268.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,763.01 : 168,039.33 = 73,380.09 : x
  2. Step 2: Convert to fraction form
    121,763.01/168,039.33 = 73,380.09/x
  3. Step 3: Cross multiply
    121,763.01x = 168,039.33 × 73,380.09
  4. Step 4: Simplify right side
    121,763.01x = 12,330,741,158.94
  5. Step 5: Solve for x
    x = 12,330,741,158.94/121,763.01
  6. Step 6: Final answer
    x = 101,268.37

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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.