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Finding the Fourth Proportional to 202,486.64, 279,433.80 and 111,845.21

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Solution

The fourth proportional to 202,486.64, 279,433.80 and 111,845.21 is: 154,347.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,486.64 : 279,433.80 = 111,845.21 : x
  2. Step 2: Convert to fraction form
    202,486.64/279,433.80 = 111,845.21/x
  3. Step 3: Cross multiply
    202,486.64x = 279,433.80 × 111,845.21
  4. Step 4: Simplify right side
    202,486.64x = 31,253,330,644.93
  5. Step 5: Solve for x
    x = 31,253,330,644.93/202,486.64
  6. Step 6: Final answer
    x = 154,347.62

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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.