Home / 190,551.88-285,786.10-78,121.45

Finding the Fourth Proportional to 190,551.88, 285,786.10 and 78,121.45

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Solution

The fourth proportional to 190,551.88, 285,786.10 and 78,121.45 is: 117,165.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,551.88 : 285,786.10 = 78,121.45 : x
  2. Step 2: Convert to fraction form
    190,551.88/285,786.10 = 78,121.45/x
  3. Step 3: Cross multiply
    190,551.88x = 285,786.10 × 78,121.45
  4. Step 4: Simplify right side
    190,551.88x = 22,326,024,521.85
  5. Step 5: Solve for x
    x = 22,326,024,521.85/190,551.88
  6. Step 6: Final answer
    x = 117,165.07

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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.