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Finding the Fourth Proportional to 67,121.20, 100,714.20 and 47,357.20

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Solution

The fourth proportional to 67,121.20, 100,714.20 and 47,357.20 is: 71,058.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,121.20 : 100,714.20 = 47,357.20 : x
  2. Step 2: Convert to fraction form
    67,121.20/100,714.20 = 47,357.20/x
  3. Step 3: Cross multiply
    67,121.20x = 100,714.20 × 47,357.20
  4. Step 4: Simplify right side
    67,121.20x = 4,769,542,512.24
  5. Step 5: Solve for x
    x = 4,769,542,512.24/67,121.20
  6. Step 6: Final answer
    x = 71,058.66

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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.