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Finding the Fourth Proportional to 136,787.94, 205,408.85 and 84,529.58

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Solution

The fourth proportional to 136,787.94, 205,408.85 and 84,529.58 is: 126,934.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,787.94 : 205,408.85 = 84,529.58 : x
  2. Step 2: Convert to fraction form
    136,787.94/205,408.85 = 84,529.58/x
  3. Step 3: Cross multiply
    136,787.94x = 205,408.85 × 84,529.58
  4. Step 4: Simplify right side
    136,787.94x = 17,363,122,369.09
  5. Step 5: Solve for x
    x = 17,363,122,369.09/136,787.94
  6. Step 6: Final answer
    x = 126,934.60

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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.