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Finding the Fourth Proportional to 71,172.48, 106,757.64 and 21,252.72

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Solution

The fourth proportional to 71,172.48, 106,757.64 and 21,252.72 is: 31,878.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,172.48 : 106,757.64 = 21,252.72 : x
  2. Step 2: Convert to fraction form
    71,172.48/106,757.64 = 21,252.72/x
  3. Step 3: Cross multiply
    71,172.48x = 106,757.64 × 21,252.72
  4. Step 4: Simplify right side
    71,172.48x = 2,268,890,230.78
  5. Step 5: Solve for x
    x = 2,268,890,230.78/71,172.48
  6. Step 6: Final answer
    x = 31,878.76

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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.