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Finding the Fourth Proportional to 85,699.96, 128,562.18 and 26,540.20

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Solution

The fourth proportional to 85,699.96, 128,562.18 and 26,540.20 is: 39,814.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,699.96 : 128,562.18 = 26,540.20 : x
  2. Step 2: Convert to fraction form
    85,699.96/128,562.18 = 26,540.20/x
  3. Step 3: Cross multiply
    85,699.96x = 128,562.18 × 26,540.20
  4. Step 4: Simplify right side
    85,699.96x = 3,412,065,969.64
  5. Step 5: Solve for x
    x = 3,412,065,969.64/85,699.96
  6. Step 6: Final answer
    x = 39,814.09

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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.