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Finding the Fourth Proportional to 190,662.21, 285,807.29 and 90,795.51

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Solution

The fourth proportional to 190,662.21, 285,807.29 and 90,795.51 is: 136,104.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,662.21 : 285,807.29 = 90,795.51 : x
  2. Step 2: Convert to fraction form
    190,662.21/285,807.29 = 90,795.51/x
  3. Step 3: Cross multiply
    190,662.21x = 285,807.29 × 90,795.51
  4. Step 4: Simplify right side
    190,662.21x = 25,950,018,203.29
  5. Step 5: Solve for x
    x = 25,950,018,203.29/190,662.21
  6. Step 6: Final answer
    x = 136,104.68

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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.