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Finding the Fourth Proportional to 67,308.20, 100,962.30 and 54,186.20

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Solution

The fourth proportional to 67,308.20, 100,962.30 and 54,186.20 is: 81,279.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,308.20 : 100,962.30 = 54,186.20 : x
  2. Step 2: Convert to fraction form
    67,308.20/100,962.30 = 54,186.20/x
  3. Step 3: Cross multiply
    67,308.20x = 100,962.30 × 54,186.20
  4. Step 4: Simplify right side
    67,308.20x = 5,470,763,380.26
  5. Step 5: Solve for x
    x = 5,470,763,380.26/67,308.20
  6. Step 6: Final answer
    x = 81,279.30

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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.