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Finding the Fourth Proportional to 100,916.44, 139,263.48 and 55,593.52

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Solution

The fourth proportional to 100,916.44, 139,263.48 and 55,593.52 is: 76,718.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,916.44 : 139,263.48 = 55,593.52 : x
  2. Step 2: Convert to fraction form
    100,916.44/139,263.48 = 55,593.52/x
  3. Step 3: Cross multiply
    100,916.44x = 139,263.48 × 55,593.52
  4. Step 4: Simplify right side
    100,916.44x = 7,742,147,060.65
  5. Step 5: Solve for x
    x = 7,742,147,060.65/100,916.44
  6. Step 6: Final answer
    x = 76,718.39

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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.