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Finding the Fourth Proportional to 129,220.80, 193,837.60 and 67,012.80

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Solution

The fourth proportional to 129,220.80, 193,837.60 and 67,012.80 is: 100,522.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,220.80 : 193,837.60 = 67,012.80 : x
  2. Step 2: Convert to fraction form
    129,220.80/193,837.60 = 67,012.80/x
  3. Step 3: Cross multiply
    129,220.80x = 193,837.60 × 67,012.80
  4. Step 4: Simplify right side
    129,220.80x = 12,989,600,321.28
  5. Step 5: Solve for x
    x = 12,989,600,321.28/129,220.80
  6. Step 6: Final answer
    x = 100,522.52

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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.