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Finding the Fourth Proportional to 67,123.42, 100,685.08 and 19,738.90

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Solution

The fourth proportional to 67,123.42, 100,685.08 and 19,738.90 is: 29,608.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,123.42 : 100,685.08 = 19,738.90 : x
  2. Step 2: Convert to fraction form
    67,123.42/100,685.08 = 19,738.90/x
  3. Step 3: Cross multiply
    67,123.42x = 100,685.08 × 19,738.90
  4. Step 4: Simplify right side
    67,123.42x = 1,987,412,725.61
  5. Step 5: Solve for x
    x = 1,987,412,725.61/67,123.42
  6. Step 6: Final answer
    x = 29,608.34

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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.