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Finding the Fourth Proportional to 93,138.70, 139,709.37 and 26,578.84

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Solution

The fourth proportional to 93,138.70, 139,709.37 and 26,578.84 is: 39,868.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,138.70 : 139,709.37 = 26,578.84 : x
  2. Step 2: Convert to fraction form
    93,138.70/139,709.37 = 26,578.84/x
  3. Step 3: Cross multiply
    93,138.70x = 139,709.37 × 26,578.84
  4. Step 4: Simplify right side
    93,138.70x = 3,713,312,583.36
  5. Step 5: Solve for x
    x = 3,713,312,583.36/93,138.70
  6. Step 6: Final answer
    x = 39,868.63

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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.