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Finding the Fourth Proportional to 40,129.68, 60,161.68 and 15,155.56

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Solution

The fourth proportional to 40,129.68, 60,161.68 and 15,155.56 is: 22,720.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,129.68 : 60,161.68 = 15,155.56 : x
  2. Step 2: Convert to fraction form
    40,129.68/60,161.68 = 15,155.56/x
  3. Step 3: Cross multiply
    40,129.68x = 60,161.68 × 15,155.56
  4. Step 4: Simplify right side
    40,129.68x = 911,783,950.94
  5. Step 5: Solve for x
    x = 911,783,950.94/40,129.68
  6. Step 6: Final answer
    x = 22,720.94

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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.