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Finding the Fourth Proportional to 207,912.87, 286,919.34 and 117,268.56

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Solution

The fourth proportional to 207,912.87, 286,919.34 and 117,268.56 is: 161,830.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,912.87 : 286,919.34 = 117,268.56 : x
  2. Step 2: Convert to fraction form
    207,912.87/286,919.34 = 117,268.56/x
  3. Step 3: Cross multiply
    207,912.87x = 286,919.34 × 117,268.56
  4. Step 4: Simplify right side
    207,912.87x = 33,646,617,837.95
  5. Step 5: Solve for x
    x = 33,646,617,837.95/207,912.87
  6. Step 6: Final answer
    x = 161,830.38

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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.