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Finding the Fourth Proportional to 212,793.60, 319,266.60 and 91,163.10

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Solution

The fourth proportional to 212,793.60, 319,266.60 and 91,163.10 is: 136,777.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,793.60 : 319,266.60 = 91,163.10 : x
  2. Step 2: Convert to fraction form
    212,793.60/319,266.60 = 91,163.10/x
  3. Step 3: Cross multiply
    212,793.60x = 319,266.60 × 91,163.10
  4. Step 4: Simplify right side
    212,793.60x = 29,105,332,982.46
  5. Step 5: Solve for x
    x = 29,105,332,982.46/212,793.60
  6. Step 6: Final answer
    x = 136,777.29

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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.