Home / 485,198.89-727,698.09-130,128.50

Finding the Fourth Proportional to 485,198.89, 727,698.09 and 130,128.50

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Solution

The fourth proportional to 485,198.89, 727,698.09 and 130,128.50 is: 195,165.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,198.89 : 727,698.09 = 130,128.50 : x
  2. Step 2: Convert to fraction form
    485,198.89/727,698.09 = 130,128.50/x
  3. Step 3: Cross multiply
    485,198.89x = 727,698.09 × 130,128.50
  4. Step 4: Simplify right side
    485,198.89x = 94,694,260,904.57
  5. Step 5: Solve for x
    x = 94,694,260,904.57/485,198.89
  6. Step 6: Final answer
    x = 195,165.87

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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.