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Finding the Fourth Proportional to 205,660.64, 308,490.36 and 72,508.79

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Solution

The fourth proportional to 205,660.64, 308,490.36 and 72,508.79 is: 108,762.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,660.64 : 308,490.36 = 72,508.79 : x
  2. Step 2: Convert to fraction form
    205,660.64/308,490.36 = 72,508.79/x
  3. Step 3: Cross multiply
    205,660.64x = 308,490.36 × 72,508.79
  4. Step 4: Simplify right side
    205,660.64x = 22,368,263,229.58
  5. Step 5: Solve for x
    x = 22,368,263,229.58/205,660.64
  6. Step 6: Final answer
    x = 108,762.97

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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.