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Finding the Fourth Proportional to 189,860, 262,011.36 and 122,908.64

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Solution

The fourth proportional to 189,860, 262,011.36 and 122,908.64 is: 169,616.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,860 : 262,011.36 = 122,908.64 : x
  2. Step 2: Convert to fraction form
    189,860/262,011.36 = 122,908.64/x
  3. Step 3: Cross multiply
    189,860x = 262,011.36 × 122,908.64
  4. Step 4: Simplify right side
    189,860x = 32,203,459,922.15
  5. Step 5: Solve for x
    x = 32,203,459,922.15/189,860
  6. Step 6: Final answer
    x = 169,616.88

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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.