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Finding the Fourth Proportional to 195,213.40, 292,820.10 and 128,728.60

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Solution

The fourth proportional to 195,213.40, 292,820.10 and 128,728.60 is: 193,092.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    195,213.40 : 292,820.10 = 128,728.60 : x
  2. Step 2: Convert to fraction form
    195,213.40/292,820.10 = 128,728.60/x
  3. Step 3: Cross multiply
    195,213.40x = 292,820.10 × 128,728.60
  4. Step 4: Simplify right side
    195,213.40x = 37,694,321,524.86
  5. Step 5: Solve for x
    x = 37,694,321,524.86/195,213.40
  6. Step 6: Final answer
    x = 193,092.90

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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.