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Finding the Fourth Proportional to 81,541.80, 122,324.88 and 28,946.88

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Solution

The fourth proportional to 81,541.80, 122,324.88 and 28,946.88 is: 43,424.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,541.80 : 122,324.88 = 28,946.88 : x
  2. Step 2: Convert to fraction form
    81,541.80/122,324.88 = 28,946.88/x
  3. Step 3: Cross multiply
    81,541.80x = 122,324.88 × 28,946.88
  4. Step 4: Simplify right side
    81,541.80x = 3,540,923,622.37
  5. Step 5: Solve for x
    x = 3,540,923,622.37/81,541.80
  6. Step 6: Final answer
    x = 43,424.64

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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.