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Finding the Fourth Proportional to 89,676.04, 133,455.41 and 86,686.24

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Solution

The fourth proportional to 89,676.04, 133,455.41 and 86,686.24 is: 129,006.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,676.04 : 133,455.41 = 86,686.24 : x
  2. Step 2: Convert to fraction form
    89,676.04/133,455.41 = 86,686.24/x
  3. Step 3: Cross multiply
    89,676.04x = 133,455.41 × 86,686.24
  4. Step 4: Simplify right side
    89,676.04x = 11,568,747,700.56
  5. Step 5: Solve for x
    x = 11,568,747,700.56/89,676.04
  6. Step 6: Final answer
    x = 129,006.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.