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Finding the Fourth Proportional to 248,640.80, 343,121.10 and 135,463.64

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Solution

The fourth proportional to 248,640.80, 343,121.10 and 135,463.64 is: 186,938.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,640.80 : 343,121.10 = 135,463.64 : x
  2. Step 2: Convert to fraction form
    248,640.80/343,121.10 = 135,463.64/x
  3. Step 3: Cross multiply
    248,640.80x = 343,121.10 × 135,463.64
  4. Step 4: Simplify right side
    248,640.80x = 46,480,433,166.80
  5. Step 5: Solve for x
    x = 46,480,433,166.80/248,640.80
  6. Step 6: Final answer
    x = 186,938.08

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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.