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Finding the Fourth Proportional to 190,663.21, 285,808.78 and 90,796.51

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Solution

The fourth proportional to 190,663.21, 285,808.78 and 90,796.51 is: 136,106.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,663.21 : 285,808.78 = 90,796.51 : x
  2. Step 2: Convert to fraction form
    190,663.21/285,808.78 = 90,796.51/x
  3. Step 3: Cross multiply
    190,663.21x = 285,808.78 × 90,796.51
  4. Step 4: Simplify right side
    190,663.21x = 25,950,439,751.36
  5. Step 5: Solve for x
    x = 25,950,439,751.36/190,663.21
  6. Step 6: Final answer
    x = 136,106.17

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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.