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Finding the Fourth Proportional to 67,123.92, 100,685.84 and 19,739.40

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Solution

The fourth proportional to 67,123.92, 100,685.84 and 19,739.40 is: 29,609.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,123.92 : 100,685.84 = 19,739.40 : x
  2. Step 2: Convert to fraction form
    67,123.92/100,685.84 = 19,739.40/x
  3. Step 3: Cross multiply
    67,123.92x = 100,685.84 × 19,739.40
  4. Step 4: Simplify right side
    67,123.92x = 1,987,477,971.40
  5. Step 5: Solve for x
    x = 1,987,477,971.40/67,123.92
  6. Step 6: Final answer
    x = 29,609.09

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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.