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Finding the Fourth Proportional to 122,257.72, 183,415.74 and 43,378.84

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Solution

The fourth proportional to 122,257.72, 183,415.74 and 43,378.84 is: 65,078.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,257.72 : 183,415.74 = 43,378.84 : x
  2. Step 2: Convert to fraction form
    122,257.72/183,415.74 = 43,378.84/x
  3. Step 3: Cross multiply
    122,257.72x = 183,415.74 × 43,378.84
  4. Step 4: Simplify right side
    122,257.72x = 7,956,362,038.94
  5. Step 5: Solve for x
    x = 7,956,362,038.94/122,257.72
  6. Step 6: Final answer
    x = 65,078.61

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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.