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Finding the Fourth Proportional to 68,475.64, 94,487.70 and 40,171

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Solution

The fourth proportional to 68,475.64, 94,487.70 and 40,171 is: 55,430.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,475.64 : 94,487.70 = 40,171 : x
  2. Step 2: Convert to fraction form
    68,475.64/94,487.70 = 40,171/x
  3. Step 3: Cross multiply
    68,475.64x = 94,487.70 × 40,171
  4. Step 4: Simplify right side
    68,475.64x = 3,795,665,396.70
  5. Step 5: Solve for x
    x = 3,795,665,396.70/68,475.64
  6. Step 6: Final answer
    x = 55,430.89

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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.