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Finding the Fourth Proportional to 273,880.80, 410,821.20 and 86,911.20

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Solution

The fourth proportional to 273,880.80, 410,821.20 and 86,911.20 is: 130,366.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,880.80 : 410,821.20 = 86,911.20 : x
  2. Step 2: Convert to fraction form
    273,880.80/410,821.20 = 86,911.20/x
  3. Step 3: Cross multiply
    273,880.80x = 410,821.20 × 86,911.20
  4. Step 4: Simplify right side
    273,880.80x = 35,704,963,477.44
  5. Step 5: Solve for x
    x = 35,704,963,477.44/273,880.80
  6. Step 6: Final answer
    x = 130,366.80

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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.