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Finding the Fourth Proportional to 40,360.80, 60,492.60 and 20,629.20

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Solution

The fourth proportional to 40,360.80, 60,492.60 and 20,629.20 is: 30,918.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,360.80 : 60,492.60 = 20,629.20 : x
  2. Step 2: Convert to fraction form
    40,360.80/60,492.60 = 20,629.20/x
  3. Step 3: Cross multiply
    40,360.80x = 60,492.60 × 20,629.20
  4. Step 4: Simplify right side
    40,360.80x = 1,247,913,943.92
  5. Step 5: Solve for x
    x = 1,247,913,943.92/40,360.80
  6. Step 6: Final answer
    x = 30,918.96

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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.