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Finding the Fourth Proportional to 248,608.92, 343,080.34 and 135,431.72

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Solution

The fourth proportional to 248,608.92, 343,080.34 and 135,431.72 is: 186,895.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,608.92 : 343,080.34 = 135,431.72 : x
  2. Step 2: Convert to fraction form
    248,608.92/343,080.34 = 135,431.72/x
  3. Step 3: Cross multiply
    248,608.92x = 343,080.34 × 135,431.72
  4. Step 4: Simplify right side
    248,608.92x = 46,463,960,544.38
  5. Step 5: Solve for x
    x = 46,463,960,544.38/248,608.92
  6. Step 6: Final answer
    x = 186,895.79

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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.