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Finding the Fourth Proportional to 270,665.20, 405,997.80 and 83,695.60

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Solution

The fourth proportional to 270,665.20, 405,997.80 and 83,695.60 is: 125,543.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,665.20 : 405,997.80 = 83,695.60 : x
  2. Step 2: Convert to fraction form
    270,665.20/405,997.80 = 83,695.60/x
  3. Step 3: Cross multiply
    270,665.20x = 405,997.80 × 83,695.60
  4. Step 4: Simplify right side
    270,665.20x = 33,980,229,469.68
  5. Step 5: Solve for x
    x = 33,980,229,469.68/270,665.20
  6. Step 6: Final answer
    x = 125,543.40

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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.