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Finding the Fourth Proportional to 91,760.80, 137,727.60 and 56,768.80

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Solution

The fourth proportional to 91,760.80, 137,727.60 and 56,768.80 is: 85,206.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,760.80 : 137,727.60 = 56,768.80 : x
  2. Step 2: Convert to fraction form
    91,760.80/137,727.60 = 56,768.80/x
  3. Step 3: Cross multiply
    91,760.80x = 137,727.60 × 56,768.80
  4. Step 4: Simplify right side
    91,760.80x = 7,818,630,578.88
  5. Step 5: Solve for x
    x = 7,818,630,578.88/91,760.80
  6. Step 6: Final answer
    x = 85,206.65

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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.