Home / 128,410.20-192,615.30-58,426.20

Finding the Fourth Proportional to 128,410.20, 192,615.30 and 58,426.20

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Solution

The fourth proportional to 128,410.20, 192,615.30 and 58,426.20 is: 87,639.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,410.20 : 192,615.30 = 58,426.20 : x
  2. Step 2: Convert to fraction form
    128,410.20/192,615.30 = 58,426.20/x
  3. Step 3: Cross multiply
    128,410.20x = 192,615.30 × 58,426.20
  4. Step 4: Simplify right side
    128,410.20x = 11,253,780,040.86
  5. Step 5: Solve for x
    x = 11,253,780,040.86/128,410.20
  6. Step 6: Final answer
    x = 87,639.30

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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.