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Finding the Fourth Proportional to 71,872.38, 107,812.62 and 21,960.18

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Solution

The fourth proportional to 71,872.38, 107,812.62 and 21,960.18 is: 32,941.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,872.38 : 107,812.62 = 21,960.18 : x
  2. Step 2: Convert to fraction form
    71,872.38/107,812.62 = 21,960.18/x
  3. Step 3: Cross multiply
    71,872.38x = 107,812.62 × 21,960.18
  4. Step 4: Simplify right side
    71,872.38x = 2,367,584,541.47
  5. Step 5: Solve for x
    x = 2,367,584,541.47/71,872.38
  6. Step 6: Final answer
    x = 32,941.51

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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.