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Finding the Fourth Proportional to 85,783.76, 128,674.80 and 33,156.44

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Solution

The fourth proportional to 85,783.76, 128,674.80 and 33,156.44 is: 49,734.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,783.76 : 128,674.80 = 33,156.44 : x
  2. Step 2: Convert to fraction form
    85,783.76/128,674.80 = 33,156.44/x
  3. Step 3: Cross multiply
    85,783.76x = 128,674.80 × 33,156.44
  4. Step 4: Simplify right side
    85,783.76x = 4,266,398,285.71
  5. Step 5: Solve for x
    x = 4,266,398,285.71/85,783.76
  6. Step 6: Final answer
    x = 49,734.34

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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.