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Finding the Fourth Proportional to 80,492.40, 120,738.60 and 74,271.60

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Solution

The fourth proportional to 80,492.40, 120,738.60 and 74,271.60 is: 111,407.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,492.40 : 120,738.60 = 74,271.60 : x
  2. Step 2: Convert to fraction form
    80,492.40/120,738.60 = 74,271.60/x
  3. Step 3: Cross multiply
    80,492.40x = 120,738.60 × 74,271.60
  4. Step 4: Simplify right side
    80,492.40x = 8,967,449,003.76
  5. Step 5: Solve for x
    x = 8,967,449,003.76/80,492.40
  6. Step 6: Final answer
    x = 111,407.40

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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.