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Finding the Fourth Proportional to 85,969.16, 128,954.59 and 25,998.11

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Solution

The fourth proportional to 85,969.16, 128,954.59 and 25,998.11 is: 38,997.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,969.16 : 128,954.59 = 25,998.11 : x
  2. Step 2: Convert to fraction form
    85,969.16/128,954.59 = 25,998.11/x
  3. Step 3: Cross multiply
    85,969.16x = 128,954.59 × 25,998.11
  4. Step 4: Simplify right side
    85,969.16x = 3,352,575,873.22
  5. Step 5: Solve for x
    x = 3,352,575,873.22/85,969.16
  6. Step 6: Final answer
    x = 38,997.42

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Double scale
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Similar ratio
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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.