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Finding the Fourth Proportional to 71,939.43, 107,909.19 and 19,354.23

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Solution

The fourth proportional to 71,939.43, 107,909.19 and 19,354.23 is: 29,031.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,939.43 : 107,909.19 = 19,354.23 : x
  2. Step 2: Convert to fraction form
    71,939.43/107,909.19 = 19,354.23/x
  3. Step 3: Cross multiply
    71,939.43x = 107,909.19 × 19,354.23
  4. Step 4: Simplify right side
    71,939.43x = 2,088,499,282.37
  5. Step 5: Solve for x
    x = 2,088,499,282.37/71,939.43
  6. Step 6: Final answer
    x = 29,031.36

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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.