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Finding the Fourth Proportional to 122,363.87, 183,538.39 and 72,759.63

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Solution

The fourth proportional to 122,363.87, 183,538.39 and 72,759.63 is: 109,135.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,363.87 : 183,538.39 = 72,759.63 : x
  2. Step 2: Convert to fraction form
    122,363.87/183,538.39 = 72,759.63/x
  3. Step 3: Cross multiply
    122,363.87x = 183,538.39 × 72,759.63
  4. Step 4: Simplify right side
    122,363.87x = 13,354,185,529.09
  5. Step 5: Solve for x
    x = 13,354,185,529.09/122,363.87
  6. Step 6: Final answer
    x = 109,135.04

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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.