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Finding the Fourth Proportional to 190,620.65, 285,745.08 and 90,754

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Solution

The fourth proportional to 190,620.65, 285,745.08 and 90,754 is: 136,042.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,620.65 : 285,745.08 = 90,754 : x
  2. Step 2: Convert to fraction form
    190,620.65/285,745.08 = 90,754/x
  3. Step 3: Cross multiply
    190,620.65x = 285,745.08 × 90,754
  4. Step 4: Simplify right side
    190,620.65x = 25,932,508,990.32
  5. Step 5: Solve for x
    x = 25,932,508,990.32/190,620.65
  6. Step 6: Final answer
    x = 136,042.50

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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.