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Finding the Fourth Proportional to 239,819.60, 330,974.60 and 139,211.60

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Solution

The fourth proportional to 239,819.60, 330,974.60 and 139,211.60 is: 192,125.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,819.60 : 330,974.60 = 139,211.60 : x
  2. Step 2: Convert to fraction form
    239,819.60/330,974.60 = 139,211.60/x
  3. Step 3: Cross multiply
    239,819.60x = 330,974.60 × 139,211.60
  4. Step 4: Simplify right side
    239,819.60x = 46,075,503,625.36
  5. Step 5: Solve for x
    x = 46,075,503,625.36/239,819.60
  6. Step 6: Final answer
    x = 192,125.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.