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Finding the Fourth Proportional to 248,991.54, 343,605.32 and 135,811.86

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Solution

The fourth proportional to 248,991.54, 343,605.32 and 135,811.86 is: 187,418.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,991.54 : 343,605.32 = 135,811.86 : x
  2. Step 2: Convert to fraction form
    248,991.54/343,605.32 = 135,811.86/x
  3. Step 3: Cross multiply
    248,991.54x = 343,605.32 × 135,811.86
  4. Step 4: Simplify right side
    248,991.54x = 46,665,677,615.10
  5. Step 5: Solve for x
    x = 46,665,677,615.10/248,991.54
  6. Step 6: Final answer
    x = 187,418.73

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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.