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Finding the Fourth Proportional to 68,474.64, 94,486.32 and 40,170

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Solution

The fourth proportional to 68,474.64, 94,486.32 and 40,170 is: 55,429.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,474.64 : 94,486.32 = 40,170 : x
  2. Step 2: Convert to fraction form
    68,474.64/94,486.32 = 40,170/x
  3. Step 3: Cross multiply
    68,474.64x = 94,486.32 × 40,170
  4. Step 4: Simplify right side
    68,474.64x = 3,795,515,474.40
  5. Step 5: Solve for x
    x = 3,795,515,474.40/68,474.64
  6. Step 6: Final answer
    x = 55,429.51

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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.