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Finding the Fourth Proportional to 279,909.62, 419,864.44 and 92,921.12

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Solution

The fourth proportional to 279,909.62, 419,864.44 and 92,921.12 is: 139,381.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,909.62 : 419,864.44 = 92,921.12 : x
  2. Step 2: Convert to fraction form
    279,909.62/419,864.44 = 92,921.12/x
  3. Step 3: Cross multiply
    279,909.62x = 419,864.44 × 92,921.12
  4. Step 4: Simplify right side
    279,909.62x = 39,014,274,012.97
  5. Step 5: Solve for x
    x = 39,014,274,012.97/279,909.62
  6. Step 6: Final answer
    x = 139,381.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.