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Finding the Fourth Proportional to 122,920.38, 184,384.08 and 66,787.38

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Solution

The fourth proportional to 122,920.38, 184,384.08 and 66,787.38 is: 100,182.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,920.38 : 184,384.08 = 66,787.38 : x
  2. Step 2: Convert to fraction form
    122,920.38/184,384.08 = 66,787.38/x
  3. Step 3: Cross multiply
    122,920.38x = 184,384.08 × 66,787.38
  4. Step 4: Simplify right side
    122,920.38x = 12,314,529,616.91
  5. Step 5: Solve for x
    x = 12,314,529,616.91/122,920.38
  6. Step 6: Final answer
    x = 100,182.98

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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.