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Finding the Fourth Proportional to 103,608.56, 155,412.81 and 68,540.02

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Solution

The fourth proportional to 103,608.56, 155,412.81 and 68,540.02 is: 102,810.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,608.56 : 155,412.81 = 68,540.02 : x
  2. Step 2: Convert to fraction form
    103,608.56/155,412.81 = 68,540.02/x
  3. Step 3: Cross multiply
    103,608.56x = 155,412.81 × 68,540.02
  4. Step 4: Simplify right side
    103,608.56x = 10,651,997,105.66
  5. Step 5: Solve for x
    x = 10,651,997,105.66/103,608.56
  6. Step 6: Final answer
    x = 102,810.01

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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.