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Finding the Fourth Proportional to 190,339.88, 285,509.81 and 65,680.88

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Solution

The fourth proportional to 190,339.88, 285,509.81 and 65,680.88 is: 98,521.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,339.88 : 285,509.81 = 65,680.88 : x
  2. Step 2: Convert to fraction form
    190,339.88/285,509.81 = 65,680.88/x
  3. Step 3: Cross multiply
    190,339.88x = 285,509.81 × 65,680.88
  4. Step 4: Simplify right side
    190,339.88x = 18,752,534,306.09
  5. Step 5: Solve for x
    x = 18,752,534,306.09/190,339.88
  6. Step 6: Final answer
    x = 98,521.31

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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.