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Finding the Fourth Proportional to 202,617.56, 279,617.82 and 111,979.40

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Solution

The fourth proportional to 202,617.56, 279,617.82 and 111,979.40 is: 154,534.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,617.56 : 279,617.82 = 111,979.40 : x
  2. Step 2: Convert to fraction form
    202,617.56/279,617.82 = 111,979.40/x
  3. Step 3: Cross multiply
    202,617.56x = 279,617.82 × 111,979.40
  4. Step 4: Simplify right side
    202,617.56x = 31,311,433,894.90
  5. Step 5: Solve for x
    x = 31,311,433,894.90/202,617.56
  6. Step 6: Final answer
    x = 154,534.65

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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.