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Finding the Fourth Proportional to 111,669.54, 154,041.53 and 68,619.12

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Solution

The fourth proportional to 111,669.54, 154,041.53 and 68,619.12 is: 94,656.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,669.54 : 154,041.53 = 68,619.12 : x
  2. Step 2: Convert to fraction form
    111,669.54/154,041.53 = 68,619.12/x
  3. Step 3: Cross multiply
    111,669.54x = 154,041.53 × 68,619.12
  4. Step 4: Simplify right side
    111,669.54x = 10,570,194,232.05
  5. Step 5: Solve for x
    x = 10,570,194,232.05/111,669.54
  6. Step 6: Final answer
    x = 94,656.02

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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.