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Finding the Fourth Proportional to 189,780.01, 261,896.42 and 103,739.33

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Solution

The fourth proportional to 189,780.01, 261,896.42 and 103,739.33 is: 143,160.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,780.01 : 261,896.42 = 103,739.33 : x
  2. Step 2: Convert to fraction form
    189,780.01/261,896.42 = 103,739.33/x
  3. Step 3: Cross multiply
    189,780.01x = 261,896.42 × 103,739.33
  4. Step 4: Simplify right side
    189,780.01x = 27,168,959,140.20
  5. Step 5: Solve for x
    x = 27,168,959,140.20/189,780.01
  6. Step 6: Final answer
    x = 143,160.28

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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.