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Finding the Fourth Proportional to 231,661.20, 347,491.80 and 81,900.30

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Solution

The fourth proportional to 231,661.20, 347,491.80 and 81,900.30 is: 122,850.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,661.20 : 347,491.80 = 81,900.30 : x
  2. Step 2: Convert to fraction form
    231,661.20/347,491.80 = 81,900.30/x
  3. Step 3: Cross multiply
    231,661.20x = 347,491.80 × 81,900.30
  4. Step 4: Simplify right side
    231,661.20x = 28,459,682,667.54
  5. Step 5: Solve for x
    x = 28,459,682,667.54/231,661.20
  6. Step 6: Final answer
    x = 122,850.45

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1.5x scale

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.