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Finding the Fourth Proportional to 202,439.12, 279,103.93 and 138,662.96

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Solution

The fourth proportional to 202,439.12, 279,103.93 and 138,662.96 is: 191,175.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,439.12 : 279,103.93 = 138,662.96 : x
  2. Step 2: Convert to fraction form
    202,439.12/279,103.93 = 138,662.96/x
  3. Step 3: Cross multiply
    202,439.12x = 279,103.93 × 138,662.96
  4. Step 4: Simplify right side
    202,439.12x = 38,701,375,339.26
  5. Step 5: Solve for x
    x = 38,701,375,339.26/202,439.12
  6. Step 6: Final answer
    x = 191,175.38

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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.