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Finding the Fourth Proportional to 101,083.36, 139,442.16 and 77,168.56

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Solution

The fourth proportional to 101,083.36, 139,442.16 and 77,168.56 is: 106,452.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,083.36 : 139,442.16 = 77,168.56 : x
  2. Step 2: Convert to fraction form
    101,083.36/139,442.16 = 77,168.56/x
  3. Step 3: Cross multiply
    101,083.36x = 139,442.16 × 77,168.56
  4. Step 4: Simplify right side
    101,083.36x = 10,760,550,690.49
  5. Step 5: Solve for x
    x = 10,760,550,690.49/101,083.36
  6. Step 6: Final answer
    x = 106,452.25

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1.5x scale

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.