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Finding the Fourth Proportional to 71,173.50, 106,778.82 and 21,253.60

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Solution

The fourth proportional to 71,173.50, 106,778.82 and 21,253.60 is: 31,885.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,173.50 : 106,778.82 = 21,253.60 : x
  2. Step 2: Convert to fraction form
    71,173.50/106,778.82 = 21,253.60/x
  3. Step 3: Cross multiply
    71,173.50x = 106,778.82 × 21,253.60
  4. Step 4: Simplify right side
    71,173.50x = 2,269,434,328.75
  5. Step 5: Solve for x
    x = 2,269,434,328.75/71,173.50
  6. Step 6: Final answer
    x = 31,885.95

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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.