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Finding the Fourth Proportional to 111,576.56, 153,979.20 and 61,275.60

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Solution

The fourth proportional to 111,576.56, 153,979.20 and 61,275.60 is: 84,562.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,576.56 : 153,979.20 = 61,275.60 : x
  2. Step 2: Convert to fraction form
    111,576.56/153,979.20 = 61,275.60/x
  3. Step 3: Cross multiply
    111,576.56x = 153,979.20 × 61,275.60
  4. Step 4: Simplify right side
    111,576.56x = 9,435,167,867.52
  5. Step 5: Solve for x
    x = 9,435,167,867.52/111,576.56
  6. Step 6: Final answer
    x = 84,562.28

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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.