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Finding the Fourth Proportional to 192,471.20, 288,512.40 and 87,365.60

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Solution

The fourth proportional to 192,471.20, 288,512.40 and 87,365.60 is: 130,960.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,471.20 : 288,512.40 = 87,365.60 : x
  2. Step 2: Convert to fraction form
    192,471.20/288,512.40 = 87,365.60/x
  3. Step 3: Cross multiply
    192,471.20x = 288,512.40 × 87,365.60
  4. Step 4: Simplify right side
    192,471.20x = 25,206,058,933.44
  5. Step 5: Solve for x
    x = 25,206,058,933.44/192,471.20
  6. Step 6: Final answer
    x = 130,960.16

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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.