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Finding the Fourth Proportional to 67,220.20, 100,830.30 and 56,722.60

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Solution

The fourth proportional to 67,220.20, 100,830.30 and 56,722.60 is: 85,083.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,220.20 : 100,830.30 = 56,722.60 : x
  2. Step 2: Convert to fraction form
    67,220.20/100,830.30 = 56,722.60/x
  3. Step 3: Cross multiply
    67,220.20x = 100,830.30 × 56,722.60
  4. Step 4: Simplify right side
    67,220.20x = 5,719,356,774.78
  5. Step 5: Solve for x
    x = 5,719,356,774.78/67,220.20
  6. Step 6: Final answer
    x = 85,083.90

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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.