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Finding the Fourth Proportional to 103,660.92, 155,392.86 and 40,521.54

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Solution

The fourth proportional to 103,660.92, 155,392.86 and 40,521.54 is: 60,743.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,660.92 : 155,392.86 = 40,521.54 : x
  2. Step 2: Convert to fraction form
    103,660.92/155,392.86 = 40,521.54/x
  3. Step 3: Cross multiply
    103,660.92x = 155,392.86 × 40,521.54
  4. Step 4: Simplify right side
    103,660.92x = 6,296,757,992.20
  5. Step 5: Solve for x
    x = 6,296,757,992.20/103,660.92
  6. Step 6: Final answer
    x = 60,743.80

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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.