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Finding the Fourth Proportional to 99,785.01, 149,878.96 and 59,879.78

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Solution

The fourth proportional to 99,785.01, 149,878.96 and 59,879.78 is: 89,940.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,785.01 : 149,878.96 = 59,879.78 : x
  2. Step 2: Convert to fraction form
    99,785.01/149,878.96 = 59,879.78/x
  3. Step 3: Cross multiply
    99,785.01x = 149,878.96 × 59,879.78
  4. Step 4: Simplify right side
    99,785.01x = 8,974,718,666.39
  5. Step 5: Solve for x
    x = 8,974,718,666.39/99,785.01
  6. Step 6: Final answer
    x = 89,940.55

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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.