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Finding the Fourth Proportional to 71,120.72, 106,679.70 and 21,234.62

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Solution

The fourth proportional to 71,120.72, 106,679.70 and 21,234.62 is: 31,851.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,120.72 : 106,679.70 = 21,234.62 : x
  2. Step 2: Convert to fraction form
    71,120.72/106,679.70 = 21,234.62/x
  3. Step 3: Cross multiply
    71,120.72x = 106,679.70 × 21,234.62
  4. Step 4: Simplify right side
    71,120.72x = 2,265,302,357.82
  5. Step 5: Solve for x
    x = 2,265,302,357.82/71,120.72
  6. Step 6: Final answer
    x = 31,851.51

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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.