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Finding the Fourth Proportional to 103,481.72, 155,331.16 and 91,710.80

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Solution

The fourth proportional to 103,481.72, 155,331.16 and 91,710.80 is: 137,662.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,481.72 : 155,331.16 = 91,710.80 : x
  2. Step 2: Convert to fraction form
    103,481.72/155,331.16 = 91,710.80/x
  3. Step 3: Cross multiply
    103,481.72x = 155,331.16 × 91,710.80
  4. Step 4: Simplify right side
    103,481.72x = 14,245,544,948.53
  5. Step 5: Solve for x
    x = 14,245,544,948.53/103,481.72
  6. Step 6: Final answer
    x = 137,662.43

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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.