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Finding the Fourth Proportional to 128,189.36, 192,309.56 and 39,439.48

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Solution

The fourth proportional to 128,189.36, 192,309.56 and 39,439.48 is: 59,167.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,189.36 : 192,309.56 = 39,439.48 : x
  2. Step 2: Convert to fraction form
    128,189.36/192,309.56 = 39,439.48/x
  3. Step 3: Cross multiply
    128,189.36x = 192,309.56 × 39,439.48
  4. Step 4: Simplify right side
    128,189.36x = 7,584,589,045.43
  5. Step 5: Solve for x
    x = 7,584,589,045.43/128,189.36
  6. Step 6: Final answer
    x = 59,167.07

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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.