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Finding the Fourth Proportional to 111,789.72, 154,300.14 and 65,889.45

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Solution

The fourth proportional to 111,789.72, 154,300.14 and 65,889.45 is: 90,945.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,789.72 : 154,300.14 = 65,889.45 : x
  2. Step 2: Convert to fraction form
    111,789.72/154,300.14 = 65,889.45/x
  3. Step 3: Cross multiply
    111,789.72x = 154,300.14 × 65,889.45
  4. Step 4: Simplify right side
    111,789.72x = 10,166,751,359.52
  5. Step 5: Solve for x
    x = 10,166,751,359.52/111,789.72
  6. Step 6: Final answer
    x = 90,945.32

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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.