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Finding the Fourth Proportional to 190,872.80, 263,404.95 and 105,989.87

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Solution

The fourth proportional to 190,872.80, 263,404.95 and 105,989.87 is: 146,266.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,872.80 : 263,404.95 = 105,989.87 : x
  2. Step 2: Convert to fraction form
    190,872.80/263,404.95 = 105,989.87/x
  3. Step 3: Cross multiply
    190,872.80x = 263,404.95 × 105,989.87
  4. Step 4: Simplify right side
    190,872.80x = 27,918,255,187.25
  5. Step 5: Solve for x
    x = 27,918,255,187.25/190,872.80
  6. Step 6: Final answer
    x = 146,266.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.