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Finding the Fourth Proportional to 86,009, 128,967 and 29,845.04

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Solution

The fourth proportional to 86,009, 128,967 and 29,845.04 is: 44,751.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,009 : 128,967 = 29,845.04 : x
  2. Step 2: Convert to fraction form
    86,009/128,967 = 29,845.04/x
  3. Step 3: Cross multiply
    86,009x = 128,967 × 29,845.04
  4. Step 4: Simplify right side
    86,009x = 3,849,025,273.68
  5. Step 5: Solve for x
    x = 3,849,025,273.68/86,009
  6. Step 6: Final answer
    x = 44,751.42

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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.