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Finding the Fourth Proportional to 103,687.12, 155,497.80 and 33,550

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Solution

The fourth proportional to 103,687.12, 155,497.80 and 33,550 is: 50,314.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,687.12 : 155,497.80 = 33,550 : x
  2. Step 2: Convert to fraction form
    103,687.12/155,497.80 = 33,550/x
  3. Step 3: Cross multiply
    103,687.12x = 155,497.80 × 33,550
  4. Step 4: Simplify right side
    103,687.12x = 5,216,951,190
  5. Step 5: Solve for x
    x = 5,216,951,190/103,687.12
  6. Step 6: Final answer
    x = 50,314.36

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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.