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Finding the Fourth Proportional to 372,129.80, 558,021.90 and 161,659.40

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Solution

The fourth proportional to 372,129.80, 558,021.90 and 161,659.40 is: 242,414.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,129.80 : 558,021.90 = 161,659.40 : x
  2. Step 2: Convert to fraction form
    372,129.80/558,021.90 = 161,659.40/x
  3. Step 3: Cross multiply
    372,129.80x = 558,021.90 × 161,659.40
  4. Step 4: Simplify right side
    372,129.80x = 90,209,485,540.86
  5. Step 5: Solve for x
    x = 90,209,485,540.86/372,129.80
  6. Step 6: Final answer
    x = 242,414.03

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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.