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Finding the Fourth Proportional to 65,388.45, 89,952.90 and 57,285.61

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Solution

The fourth proportional to 65,388.45, 89,952.90 and 57,285.61 is: 78,806.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,388.45 : 89,952.90 = 57,285.61 : x
  2. Step 2: Convert to fraction form
    65,388.45/89,952.90 = 57,285.61/x
  3. Step 3: Cross multiply
    65,388.45x = 89,952.90 × 57,285.61
  4. Step 4: Simplify right side
    65,388.45x = 5,153,006,747.77
  5. Step 5: Solve for x
    x = 5,153,006,747.77/65,388.45
  6. Step 6: Final answer
    x = 78,806.07

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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.