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Finding the Fourth Proportional to 118,611.48, 163,687.92 and 64,896.51

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Solution

The fourth proportional to 118,611.48, 163,687.92 and 64,896.51 is: 89,559.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,611.48 : 163,687.92 = 64,896.51 : x
  2. Step 2: Convert to fraction form
    118,611.48/163,687.92 = 64,896.51/x
  3. Step 3: Cross multiply
    118,611.48x = 163,687.92 × 64,896.51
  4. Step 4: Simplify right side
    118,611.48x = 10,622,774,737.16
  5. Step 5: Solve for x
    x = 10,622,774,737.16/118,611.48
  6. Step 6: Final answer
    x = 89,559.41

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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.