Home / 53,409.28-80,125.20-20,128.64

Finding the Fourth Proportional to 53,409.28, 80,125.20 and 20,128.64

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Solution

The fourth proportional to 53,409.28, 80,125.20 and 20,128.64 is: 30,197.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,409.28 : 80,125.20 = 20,128.64 : x
  2. Step 2: Convert to fraction form
    53,409.28/80,125.20 = 20,128.64/x
  3. Step 3: Cross multiply
    53,409.28x = 80,125.20 × 20,128.64
  4. Step 4: Simplify right side
    53,409.28x = 1,612,811,305.73
  5. Step 5: Solve for x
    x = 1,612,811,305.73/53,409.28
  6. Step 6: Final answer
    x = 30,197.21

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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.