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Finding the Fourth Proportional to 89,005.80, 133,508.70 and 85,895.40

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Solution

The fourth proportional to 89,005.80, 133,508.70 and 85,895.40 is: 128,843.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,005.80 : 133,508.70 = 85,895.40 : x
  2. Step 2: Convert to fraction form
    89,005.80/133,508.70 = 85,895.40/x
  3. Step 3: Cross multiply
    89,005.80x = 133,508.70 × 85,895.40
  4. Step 4: Simplify right side
    89,005.80x = 11,467,783,189.98
  5. Step 5: Solve for x
    x = 11,467,783,189.98/89,005.80
  6. Step 6: Final answer
    x = 128,843.10

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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.