Home / 426,628.35-640,047.78-127,107.75

Finding the Fourth Proportional to 426,628.35, 640,047.78 and 127,107.75

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Solution

The fourth proportional to 426,628.35, 640,047.78 and 127,107.75 is: 190,692.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,628.35 : 640,047.78 = 127,107.75 : x
  2. Step 2: Convert to fraction form
    426,628.35/640,047.78 = 127,107.75/x
  3. Step 3: Cross multiply
    426,628.35x = 640,047.78 × 127,107.75
  4. Step 4: Simplify right side
    426,628.35x = 81,355,033,208.30
  5. Step 5: Solve for x
    x = 81,355,033,208.30/426,628.35
  6. Step 6: Final answer
    x = 190,692.98

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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.