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Finding the Fourth Proportional to 80,408.88, 120,688.04 and 40,995.60

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Solution

The fourth proportional to 80,408.88, 120,688.04 and 40,995.60 is: 61,531.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,408.88 : 120,688.04 = 40,995.60 : x
  2. Step 2: Convert to fraction form
    80,408.88/120,688.04 = 40,995.60/x
  3. Step 3: Cross multiply
    80,408.88x = 120,688.04 × 40,995.60
  4. Step 4: Simplify right side
    80,408.88x = 4,947,678,612.62
  5. Step 5: Solve for x
    x = 4,947,678,612.62/80,408.88
  6. Step 6: Final answer
    x = 61,531.50

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1.5x scale

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.