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Finding the Fourth Proportional to 80,765.88, 121,153.68 and 25,361.88

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Solution

The fourth proportional to 80,765.88, 121,153.68 and 25,361.88 is: 38,044.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,765.88 : 121,153.68 = 25,361.88 : x
  2. Step 2: Convert to fraction form
    80,765.88/121,153.68 = 25,361.88/x
  3. Step 3: Cross multiply
    80,765.88x = 121,153.68 × 25,361.88
  4. Step 4: Simplify right side
    80,765.88x = 3,072,685,093.72
  5. Step 5: Solve for x
    x = 3,072,685,093.72/80,765.88
  6. Step 6: Final answer
    x = 38,044.35

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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.