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Finding the Fourth Proportional to 248,578.12, 343,046.10 and 135,411.40

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Solution

The fourth proportional to 248,578.12, 343,046.10 and 135,411.40 is: 186,872.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,578.12 : 343,046.10 = 135,411.40 : x
  2. Step 2: Convert to fraction form
    248,578.12/343,046.10 = 135,411.40/x
  3. Step 3: Cross multiply
    248,578.12x = 343,046.10 × 135,411.40
  4. Step 4: Simplify right side
    248,578.12x = 46,452,352,665.54
  5. Step 5: Solve for x
    x = 46,452,352,665.54/248,578.12
  6. Step 6: Final answer
    x = 186,872.25

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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.