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Finding the Fourth Proportional to 64,474.56, 96,669.36 and 31,128.48

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Solution

The fourth proportional to 64,474.56, 96,669.36 and 31,128.48 is: 46,672.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,474.56 : 96,669.36 = 31,128.48 : x
  2. Step 2: Convert to fraction form
    64,474.56/96,669.36 = 31,128.48/x
  3. Step 3: Cross multiply
    64,474.56x = 96,669.36 × 31,128.48
  4. Step 4: Simplify right side
    64,474.56x = 3,009,170,239.37
  5. Step 5: Solve for x
    x = 3,009,170,239.37/64,474.56
  6. Step 6: Final answer
    x = 46,672.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.