Home / 427,583.16-641,194.30-128,106.32

Finding the Fourth Proportional to 427,583.16, 641,194.30 and 128,106.32

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Solution

The fourth proportional to 427,583.16, 641,194.30 and 128,106.32 is: 192,105.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,583.16 : 641,194.30 = 128,106.32 : x
  2. Step 2: Convert to fraction form
    427,583.16/641,194.30 = 128,106.32/x
  3. Step 3: Cross multiply
    427,583.16x = 641,194.30 × 128,106.32
  4. Step 4: Simplify right side
    427,583.16x = 82,141,042,177.98
  5. Step 5: Solve for x
    x = 82,141,042,177.98/427,583.16
  6. Step 6: Final answer
    x = 192,105.42

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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.