Home / 190,515.33-285,780.89-78,116.29

Finding the Fourth Proportional to 190,515.33, 285,780.89 and 78,116.29

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Solution

The fourth proportional to 190,515.33, 285,780.89 and 78,116.29 is: 117,177.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,515.33 : 285,780.89 = 78,116.29 : x
  2. Step 2: Convert to fraction form
    190,515.33/285,780.89 = 78,116.29/x
  3. Step 3: Cross multiply
    190,515.33x = 285,780.89 × 78,116.29
  4. Step 4: Simplify right side
    190,515.33x = 22,324,142,360.54
  5. Step 5: Solve for x
    x = 22,324,142,360.54/190,515.33
  6. Step 6: Final answer
    x = 117,177.67

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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.