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Finding the Fourth Proportional to 86,008.96, 128,947.20 and 26,809.60

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Solution

The fourth proportional to 86,008.96, 128,947.20 and 26,809.60 is: 40,193.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,008.96 : 128,947.20 = 26,809.60 : x
  2. Step 2: Convert to fraction form
    86,008.96/128,947.20 = 26,809.60/x
  3. Step 3: Cross multiply
    86,008.96x = 128,947.20 × 26,809.60
  4. Step 4: Simplify right side
    86,008.96x = 3,457,022,853.12
  5. Step 5: Solve for x
    x = 3,457,022,853.12/86,008.96
  6. Step 6: Final answer
    x = 40,193.75

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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.