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Finding the Fourth Proportional to 128,499.20, 192,748.80 and 35,004.80

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Solution

The fourth proportional to 128,499.20, 192,748.80 and 35,004.80 is: 52,507.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,499.20 : 192,748.80 = 35,004.80 : x
  2. Step 2: Convert to fraction form
    128,499.20/192,748.80 = 35,004.80/x
  3. Step 3: Cross multiply
    128,499.20x = 192,748.80 × 35,004.80
  4. Step 4: Simplify right side
    128,499.20x = 6,747,133,194.24
  5. Step 5: Solve for x
    x = 6,747,133,194.24/128,499.20
  6. Step 6: Final answer
    x = 52,507.20

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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.