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Finding the Fourth Proportional to 251,379.94, 346,910.49 and 138,202.90

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Solution

The fourth proportional to 251,379.94, 346,910.49 and 138,202.90 is: 190,723.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,379.94 : 346,910.49 = 138,202.90 : x
  2. Step 2: Convert to fraction form
    251,379.94/346,910.49 = 138,202.90/x
  3. Step 3: Cross multiply
    251,379.94x = 346,910.49 × 138,202.90
  4. Step 4: Simplify right side
    251,379.94x = 47,944,035,758.42
  5. Step 5: Solve for x
    x = 47,944,035,758.42/251,379.94
  6. Step 6: Final answer
    x = 190,723.40

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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.