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Finding the Fourth Proportional to 248,620.80, 343,084.80 and 135,443.20

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Solution

The fourth proportional to 248,620.80, 343,084.80 and 135,443.20 is: 186,905.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,620.80 : 343,084.80 = 135,443.20 : x
  2. Step 2: Convert to fraction form
    248,620.80/343,084.80 = 135,443.20/x
  3. Step 3: Cross multiply
    248,620.80x = 343,084.80 × 135,443.20
  4. Step 4: Simplify right side
    248,620.80x = 46,468,503,183.36
  5. Step 5: Solve for x
    x = 46,468,503,183.36/248,620.80
  6. Step 6: Final answer
    x = 186,905.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.