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Finding the Fourth Proportional to 103,728.90, 155,334.15 and 82,992.90

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Solution

The fourth proportional to 103,728.90, 155,334.15 and 82,992.90 is: 124,281.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,728.90 : 155,334.15 = 82,992.90 : x
  2. Step 2: Convert to fraction form
    103,728.90/155,334.15 = 82,992.90/x
  3. Step 3: Cross multiply
    103,728.90x = 155,334.15 × 82,992.90
  4. Step 4: Simplify right side
    103,728.90x = 12,891,631,577.54
  5. Step 5: Solve for x
    x = 12,891,631,577.54/103,728.90
  6. Step 6: Final answer
    x = 124,281.97

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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.