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Finding the Fourth Proportional to 71,907.62, 107,861.39 and 21,987.71

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Solution

The fourth proportional to 71,907.62, 107,861.39 and 21,987.71 is: 32,981.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,907.62 : 107,861.39 = 21,987.71 : x
  2. Step 2: Convert to fraction form
    71,907.62/107,861.39 = 21,987.71/x
  3. Step 3: Cross multiply
    71,907.62x = 107,861.39 × 21,987.71
  4. Step 4: Simplify right side
    71,907.62x = 2,371,624,479.18
  5. Step 5: Solve for x
    x = 2,371,624,479.18/71,907.62
  6. Step 6: Final answer
    x = 32,981.55

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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.