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Finding the Fourth Proportional to 80,401.41, 120,611.43 and 30,518.78

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Solution

The fourth proportional to 80,401.41, 120,611.43 and 30,518.78 is: 45,781.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,401.41 : 120,611.43 = 30,518.78 : x
  2. Step 2: Convert to fraction form
    80,401.41/120,611.43 = 30,518.78/x
  3. Step 3: Cross multiply
    80,401.41x = 120,611.43 × 30,518.78
  4. Step 4: Simplify right side
    80,401.41x = 3,680,913,094.60
  5. Step 5: Solve for x
    x = 3,680,913,094.60/80,401.41
  6. Step 6: Final answer
    x = 45,781.70

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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.