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Finding the Fourth Proportional to 245,561.50, 338,850.66 and 138,129.22

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Solution

The fourth proportional to 245,561.50, 338,850.66 and 138,129.22 is: 190,604.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,561.50 : 338,850.66 = 138,129.22 : x
  2. Step 2: Convert to fraction form
    245,561.50/338,850.66 = 138,129.22/x
  3. Step 3: Cross multiply
    245,561.50x = 338,850.66 × 138,129.22
  4. Step 4: Simplify right side
    245,561.50x = 46,805,177,362.29
  5. Step 5: Solve for x
    x = 46,805,177,362.29/245,561.50
  6. Step 6: Final answer
    x = 190,604.71

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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.