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Finding the Fourth Proportional to 103,659.43, 155,390.62 and 40,520.03

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Solution

The fourth proportional to 103,659.43, 155,390.62 and 40,520.03 is: 60,741.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,659.43 : 155,390.62 = 40,520.03 : x
  2. Step 2: Convert to fraction form
    103,659.43/155,390.62 = 40,520.03/x
  3. Step 3: Cross multiply
    103,659.43x = 155,390.62 × 40,520.03
  4. Step 4: Simplify right side
    103,659.43x = 6,296,432,584.12
  5. Step 5: Solve for x
    x = 6,296,432,584.12/103,659.43
  6. Step 6: Final answer
    x = 60,741.53

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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.