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Finding the Fourth Proportional to 231,480.89, 347,222.21 and 81,639.80

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Solution

The fourth proportional to 231,480.89, 347,222.21 and 81,639.80 is: 122,460.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,480.89 : 347,222.21 = 81,639.80 : x
  2. Step 2: Convert to fraction form
    231,480.89/347,222.21 = 81,639.80/x
  3. Step 3: Cross multiply
    231,480.89x = 347,222.21 × 81,639.80
  4. Step 4: Simplify right side
    231,480.89x = 28,347,149,635.65
  5. Step 5: Solve for x
    x = 28,347,149,635.65/231,480.89
  6. Step 6: Final answer
    x = 122,460.00

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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.