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Finding the Fourth Proportional to 104,986.80, 157,480.20 and 81,367.20

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Solution

The fourth proportional to 104,986.80, 157,480.20 and 81,367.20 is: 122,050.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,986.80 : 157,480.20 = 81,367.20 : x
  2. Step 2: Convert to fraction form
    104,986.80/157,480.20 = 81,367.20/x
  3. Step 3: Cross multiply
    104,986.80x = 157,480.20 × 81,367.20
  4. Step 4: Simplify right side
    104,986.80x = 12,813,722,929.44
  5. Step 5: Solve for x
    x = 12,813,722,929.44/104,986.80
  6. Step 6: Final answer
    x = 122,050.80

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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.