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Finding the Fourth Proportional to 129,213.80, 193,827.10 and 67,005.80

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Solution

The fourth proportional to 129,213.80, 193,827.10 and 67,005.80 is: 100,512.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,213.80 : 193,827.10 = 67,005.80 : x
  2. Step 2: Convert to fraction form
    129,213.80/193,827.10 = 67,005.80/x
  3. Step 3: Cross multiply
    129,213.80x = 193,827.10 × 67,005.80
  4. Step 4: Simplify right side
    129,213.80x = 12,987,539,897.18
  5. Step 5: Solve for x
    x = 12,987,539,897.18/129,213.80
  6. Step 6: Final answer
    x = 100,512.02

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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.