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Finding the Fourth Proportional to 189,173.54, 260,911.77 and 121,196.79

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Solution

The fourth proportional to 189,173.54, 260,911.77 and 121,196.79 is: 167,156.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,173.54 : 260,911.77 = 121,196.79 : x
  2. Step 2: Convert to fraction form
    189,173.54/260,911.77 = 121,196.79/x
  3. Step 3: Cross multiply
    189,173.54x = 260,911.77 × 121,196.79
  4. Step 4: Simplify right side
    189,173.54x = 31,621,668,542.73
  5. Step 5: Solve for x
    x = 31,621,668,542.73/189,173.54
  6. Step 6: Final answer
    x = 167,156.93

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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.