Home / 190,553.72-285,763.80-78,201.50

Finding the Fourth Proportional to 190,553.72, 285,763.80 and 78,201.50

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Solution

The fourth proportional to 190,553.72, 285,763.80 and 78,201.50 is: 117,274.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,553.72 : 285,763.80 = 78,201.50 : x
  2. Step 2: Convert to fraction form
    190,553.72/285,763.80 = 78,201.50/x
  3. Step 3: Cross multiply
    190,553.72x = 285,763.80 × 78,201.50
  4. Step 4: Simplify right side
    190,553.72x = 22,347,157,805.70
  5. Step 5: Solve for x
    x = 22,347,157,805.70/190,553.72
  6. Step 6: Final answer
    x = 117,274.84

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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.