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Finding the Fourth Proportional to 202,419, 279,338.22 and 112,995

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Solution

The fourth proportional to 202,419, 279,338.22 and 112,995 is: 155,933.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,419 : 279,338.22 = 112,995 : x
  2. Step 2: Convert to fraction form
    202,419/279,338.22 = 112,995/x
  3. Step 3: Cross multiply
    202,419x = 279,338.22 × 112,995
  4. Step 4: Simplify right side
    202,419x = 31,563,822,168.90
  5. Step 5: Solve for x
    x = 31,563,822,168.90/202,419
  6. Step 6: Final answer
    x = 155,933.10

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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.