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Finding the Fourth Proportional to 85,692.86, 128,544.76 and 26,523.56

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Solution

The fourth proportional to 85,692.86, 128,544.76 and 26,523.56 is: 39,787.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,692.86 : 128,544.76 = 26,523.56 : x
  2. Step 2: Convert to fraction form
    85,692.86/128,544.76 = 26,523.56/x
  3. Step 3: Cross multiply
    85,692.86x = 128,544.76 × 26,523.56
  4. Step 4: Simplify right side
    85,692.86x = 3,409,464,654.55
  5. Step 5: Solve for x
    x = 3,409,464,654.55/85,692.86
  6. Step 6: Final answer
    x = 39,787.03

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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.