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Finding the Fourth Proportional to 425,571.09, 638,450.07 and 126,075.12

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Solution

The fourth proportional to 425,571.09, 638,450.07 and 126,075.12 is: 189,140.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,571.09 : 638,450.07 = 126,075.12 : x
  2. Step 2: Convert to fraction form
    425,571.09/638,450.07 = 126,075.12/x
  3. Step 3: Cross multiply
    425,571.09x = 638,450.07 × 126,075.12
  4. Step 4: Simplify right side
    425,571.09x = 80,492,669,189.26
  5. Step 5: Solve for x
    x = 80,492,669,189.26/425,571.09
  6. Step 6: Final answer
    x = 189,140.36

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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.