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Finding the Fourth Proportional to 65,388.38, 89,952.80 and 57,285.54

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Solution

The fourth proportional to 65,388.38, 89,952.80 and 57,285.54 is: 78,805.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,388.38 : 89,952.80 = 57,285.54 : x
  2. Step 2: Convert to fraction form
    65,388.38/89,952.80 = 57,285.54/x
  3. Step 3: Cross multiply
    65,388.38x = 89,952.80 × 57,285.54
  4. Step 4: Simplify right side
    65,388.38x = 5,152,994,436.08
  5. Step 5: Solve for x
    x = 5,152,994,436.08/65,388.38
  6. Step 6: Final answer
    x = 78,805.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.