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Finding the Fourth Proportional to 243,880.80, 365,821.20 and 103,621.20

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Solution

The fourth proportional to 243,880.80, 365,821.20 and 103,621.20 is: 155,431.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,880.80 : 365,821.20 = 103,621.20 : x
  2. Step 2: Convert to fraction form
    243,880.80/365,821.20 = 103,621.20/x
  3. Step 3: Cross multiply
    243,880.80x = 365,821.20 × 103,621.20
  4. Step 4: Simplify right side
    243,880.80x = 37,906,831,729.44
  5. Step 5: Solve for x
    x = 37,906,831,729.44/243,880.80
  6. Step 6: Final answer
    x = 155,431.80

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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.