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Finding the Fourth Proportional to 128,026.12, 192,174.46 and 71,914.20

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Solution

The fourth proportional to 128,026.12, 192,174.46 and 71,914.20 is: 107,947.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,026.12 : 192,174.46 = 71,914.20 : x
  2. Step 2: Convert to fraction form
    128,026.12/192,174.46 = 71,914.20/x
  3. Step 3: Cross multiply
    128,026.12x = 192,174.46 × 71,914.20
  4. Step 4: Simplify right side
    128,026.12x = 13,820,072,551.33
  5. Step 5: Solve for x
    x = 13,820,072,551.33/128,026.12
  6. Step 6: Final answer
    x = 107,947.29

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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.