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Finding the Fourth Proportional to 85,404.24, 127,826.64 and 77,219.28

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Solution

The fourth proportional to 85,404.24, 127,826.64 and 77,219.28 is: 115,576.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,404.24 : 127,826.64 = 77,219.28 : x
  2. Step 2: Convert to fraction form
    85,404.24/127,826.64 = 77,219.28/x
  3. Step 3: Cross multiply
    85,404.24x = 127,826.64 × 77,219.28
  4. Step 4: Simplify right side
    85,404.24x = 9,870,681,105.62
  5. Step 5: Solve for x
    x = 9,870,681,105.62/85,404.24
  6. Step 6: Final answer
    x = 115,576.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.