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Finding the Fourth Proportional to 273,021.78, 409,531.05 and 70,617.90

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Solution

The fourth proportional to 273,021.78, 409,531.05 and 70,617.90 is: 105,926.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,021.78 : 409,531.05 = 70,617.90 : x
  2. Step 2: Convert to fraction form
    273,021.78/409,531.05 = 70,617.90/x
  3. Step 3: Cross multiply
    273,021.78x = 409,531.05 × 70,617.90
  4. Step 4: Simplify right side
    273,021.78x = 28,920,222,735.80
  5. Step 5: Solve for x
    x = 28,920,222,735.80/273,021.78
  6. Step 6: Final answer
    x = 105,926.43

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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.