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Finding the Fourth Proportional to 71,853.89, 107,766.25 and 19,251.07

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Solution

The fourth proportional to 71,853.89, 107,766.25 and 19,251.07 is: 28,872.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,853.89 : 107,766.25 = 19,251.07 : x
  2. Step 2: Convert to fraction form
    71,853.89/107,766.25 = 19,251.07/x
  3. Step 3: Cross multiply
    71,853.89x = 107,766.25 × 19,251.07
  4. Step 4: Simplify right side
    71,853.89x = 2,074,615,304.84
  5. Step 5: Solve for x
    x = 2,074,615,304.84/71,853.89
  6. Step 6: Final answer
    x = 28,872.69

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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.