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Finding the Fourth Proportional to 65,804.66, 90,816.21 and 38,933.62

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Solution

The fourth proportional to 65,804.66, 90,816.21 and 38,933.62 is: 53,731.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,804.66 : 90,816.21 = 38,933.62 : x
  2. Step 2: Convert to fraction form
    65,804.66/90,816.21 = 38,933.62/x
  3. Step 3: Cross multiply
    65,804.66x = 90,816.21 × 38,933.62
  4. Step 4: Simplify right side
    65,804.66x = 3,535,803,809.98
  5. Step 5: Solve for x
    x = 3,535,803,809.98/65,804.66
  6. Step 6: Final answer
    x = 53,731.81

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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.