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Finding the Fourth Proportional to 71,399.40, 107,099.10 and 68,677.80

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Solution

The fourth proportional to 71,399.40, 107,099.10 and 68,677.80 is: 103,016.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,399.40 : 107,099.10 = 68,677.80 : x
  2. Step 2: Convert to fraction form
    71,399.40/107,099.10 = 68,677.80/x
  3. Step 3: Cross multiply
    71,399.40x = 107,099.10 × 68,677.80
  4. Step 4: Simplify right side
    71,399.40x = 7,355,330,569.98
  5. Step 5: Solve for x
    x = 7,355,330,569.98/71,399.40
  6. Step 6: Final answer
    x = 103,016.70

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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.