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Finding the Fourth Proportional to 65,216.64, 89,990.16 and 38,343.60

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Solution

The fourth proportional to 65,216.64, 89,990.16 and 38,343.60 is: 52,908.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,216.64 : 89,990.16 = 38,343.60 : x
  2. Step 2: Convert to fraction form
    65,216.64/89,990.16 = 38,343.60/x
  3. Step 3: Cross multiply
    65,216.64x = 89,990.16 × 38,343.60
  4. Step 4: Simplify right side
    65,216.64x = 3,450,546,698.98
  5. Step 5: Solve for x
    x = 3,450,546,698.98/65,216.64
  6. Step 6: Final answer
    x = 52,908.99

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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.