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Finding the Fourth Proportional to 192,857.40, 289,241.55 and 72,927.18

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Solution

The fourth proportional to 192,857.40, 289,241.55 and 72,927.18 is: 109,373.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,857.40 : 289,241.55 = 72,927.18 : x
  2. Step 2: Convert to fraction form
    192,857.40/289,241.55 = 72,927.18/x
  3. Step 3: Cross multiply
    192,857.40x = 289,241.55 × 72,927.18
  4. Step 4: Simplify right side
    192,857.40x = 21,093,570,580.33
  5. Step 5: Solve for x
    x = 21,093,570,580.33/192,857.40
  6. Step 6: Final answer
    x = 109,373.92

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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.