Home / 190,389.71-285,491.25-78,039.36

Finding the Fourth Proportional to 190,389.71, 285,491.25 and 78,039.36

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Solution

The fourth proportional to 190,389.71, 285,491.25 and 78,039.36 is: 117,020.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,389.71 : 285,491.25 = 78,039.36 : x
  2. Step 2: Convert to fraction form
    190,389.71/285,491.25 = 78,039.36/x
  3. Step 3: Cross multiply
    190,389.71x = 285,491.25 × 78,039.36
  4. Step 4: Simplify right side
    190,389.71x = 22,279,555,798.84
  5. Step 5: Solve for x
    x = 22,279,555,798.84/190,389.71
  6. Step 6: Final answer
    x = 117,020.80

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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.