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Finding the Fourth Proportional to 192,381.88, 288,577.74 and 91,156.18

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Solution

The fourth proportional to 192,381.88, 288,577.74 and 91,156.18 is: 136,736.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,381.88 : 288,577.74 = 91,156.18 : x
  2. Step 2: Convert to fraction form
    192,381.88/288,577.74 = 91,156.18/x
  3. Step 3: Cross multiply
    192,381.88x = 288,577.74 × 91,156.18
  4. Step 4: Simplify right side
    192,381.88x = 26,305,644,411.43
  5. Step 5: Solve for x
    x = 26,305,644,411.43/192,381.88
  6. Step 6: Final answer
    x = 136,736.60

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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.