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Finding the Fourth Proportional to 121,139.87, 181,735.76 and 36,906.82

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Solution

The fourth proportional to 121,139.87, 181,735.76 and 36,906.82 is: 55,368.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,139.87 : 181,735.76 = 36,906.82 : x
  2. Step 2: Convert to fraction form
    121,139.87/181,735.76 = 36,906.82/x
  3. Step 3: Cross multiply
    121,139.87x = 181,735.76 × 36,906.82
  4. Step 4: Simplify right side
    121,139.87x = 6,707,288,412.21
  5. Step 5: Solve for x
    x = 6,707,288,412.21/121,139.87
  6. Step 6: Final answer
    x = 55,368.14

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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.