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Finding the Fourth Proportional to 65,553.60, 90,440.64 and 38,682.66

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Solution

The fourth proportional to 65,553.60, 90,440.64 and 38,682.66 is: 53,368.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,553.60 : 90,440.64 = 38,682.66 : x
  2. Step 2: Convert to fraction form
    65,553.60/90,440.64 = 38,682.66/x
  3. Step 3: Cross multiply
    65,553.60x = 90,440.64 × 38,682.66
  4. Step 4: Simplify right side
    65,553.60x = 3,498,484,527.30
  5. Step 5: Solve for x
    x = 3,498,484,527.30/65,553.60
  6. Step 6: Final answer
    x = 53,368.31

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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.