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Finding the Fourth Proportional to 102,940.20, 154,410.30 and 36,379.80

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Solution

The fourth proportional to 102,940.20, 154,410.30 and 36,379.80 is: 54,569.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,940.20 : 154,410.30 = 36,379.80 : x
  2. Step 2: Convert to fraction form
    102,940.20/154,410.30 = 36,379.80/x
  3. Step 3: Cross multiply
    102,940.20x = 154,410.30 × 36,379.80
  4. Step 4: Simplify right side
    102,940.20x = 5,617,415,831.94
  5. Step 5: Solve for x
    x = 5,617,415,831.94/102,940.20
  6. Step 6: Final answer
    x = 54,569.70

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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.