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Finding the Fourth Proportional to 71,679.28, 107,504.88 and 68,123.12

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Solution

The fourth proportional to 71,679.28, 107,504.88 and 68,123.12 is: 102,171.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,679.28 : 107,504.88 = 68,123.12 : x
  2. Step 2: Convert to fraction form
    71,679.28/107,504.88 = 68,123.12/x
  3. Step 3: Cross multiply
    71,679.28x = 107,504.88 × 68,123.12
  4. Step 4: Simplify right side
    71,679.28x = 7,323,567,840.83
  5. Step 5: Solve for x
    x = 7,323,567,840.83/71,679.28
  6. Step 6: Final answer
    x = 102,171.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.