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Finding the Fourth Proportional to 189,658.96, 261,781.44 and 117,996.24

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Solution

The fourth proportional to 189,658.96, 261,781.44 and 117,996.24 is: 162,867.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,658.96 : 261,781.44 = 117,996.24 : x
  2. Step 2: Convert to fraction form
    189,658.96/261,781.44 = 117,996.24/x
  3. Step 3: Cross multiply
    189,658.96x = 261,781.44 × 117,996.24
  4. Step 4: Simplify right side
    189,658.96x = 30,889,225,621.79
  5. Step 5: Solve for x
    x = 30,889,225,621.79/189,658.96
  6. Step 6: Final answer
    x = 162,867.21

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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.