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Finding the Fourth Proportional to 55,679.75, 76,837.11 and 31,480.31

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Solution

The fourth proportional to 55,679.75, 76,837.11 and 31,480.31 is: 43,442.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,679.75 : 76,837.11 = 31,480.31 : x
  2. Step 2: Convert to fraction form
    55,679.75/76,837.11 = 31,480.31/x
  3. Step 3: Cross multiply
    55,679.75x = 76,837.11 × 31,480.31
  4. Step 4: Simplify right side
    55,679.75x = 2,418,856,116.35
  5. Step 5: Solve for x
    x = 2,418,856,116.35/55,679.75
  6. Step 6: Final answer
    x = 43,442.30

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1.5x scale

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.