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Finding the Fourth Proportional to 193,178, 266,586.60 and 112,661.36

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Solution

The fourth proportional to 193,178, 266,586.60 and 112,661.36 is: 155,473.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,178 : 266,586.60 = 112,661.36 : x
  2. Step 2: Convert to fraction form
    193,178/266,586.60 = 112,661.36/x
  3. Step 3: Cross multiply
    193,178x = 266,586.60 × 112,661.36
  4. Step 4: Simplify right side
    193,178x = 30,034,008,913.78
  5. Step 5: Solve for x
    x = 30,034,008,913.78/193,178
  6. Step 6: Final answer
    x = 155,473.24

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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.