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Finding the Fourth Proportional to 85,863.70, 128,795.55 and 26,705.35

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Solution

The fourth proportional to 85,863.70, 128,795.55 and 26,705.35 is: 40,058.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,863.70 : 128,795.55 = 26,705.35 : x
  2. Step 2: Convert to fraction form
    85,863.70/128,795.55 = 26,705.35/x
  3. Step 3: Cross multiply
    85,863.70x = 128,795.55 × 26,705.35
  4. Step 4: Simplify right side
    85,863.70x = 3,439,530,241.19
  5. Step 5: Solve for x
    x = 3,439,530,241.19/85,863.70
  6. Step 6: Final answer
    x = 40,058.03

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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.