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Finding the Fourth Proportional to 67,031.80, 100,401.90 and 53,909.80

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Solution

The fourth proportional to 67,031.80, 100,401.90 and 53,909.80 is: 80,747.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,031.80 : 100,401.90 = 53,909.80 : x
  2. Step 2: Convert to fraction form
    67,031.80/100,401.90 = 53,909.80/x
  3. Step 3: Cross multiply
    67,031.80x = 100,401.90 × 53,909.80
  4. Step 4: Simplify right side
    67,031.80x = 5,412,646,348.62
  5. Step 5: Solve for x
    x = 5,412,646,348.62/67,031.80
  6. Step 6: Final answer
    x = 80,747.44

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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.