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Finding the Fourth Proportional to 279,795.90, 419,722.20 and 90,207.30

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Solution

The fourth proportional to 279,795.90, 419,722.20 and 90,207.30 is: 135,320.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,795.90 : 419,722.20 = 90,207.30 : x
  2. Step 2: Convert to fraction form
    279,795.90/419,722.20 = 90,207.30/x
  3. Step 3: Cross multiply
    279,795.90x = 419,722.20 × 90,207.30
  4. Step 4: Simplify right side
    279,795.90x = 37,862,006,412.06
  5. Step 5: Solve for x
    x = 37,862,006,412.06/279,795.90
  6. Step 6: Final answer
    x = 135,320.09

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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.