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Finding the Fourth Proportional to 122,368.62, 168,554.06 and 86,496.96

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Solution

The fourth proportional to 122,368.62, 168,554.06 and 86,496.96 is: 119,143.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,368.62 : 168,554.06 = 86,496.96 : x
  2. Step 2: Convert to fraction form
    122,368.62/168,554.06 = 86,496.96/x
  3. Step 3: Cross multiply
    122,368.62x = 168,554.06 × 86,496.96
  4. Step 4: Simplify right side
    122,368.62x = 14,579,414,796.16
  5. Step 5: Solve for x
    x = 14,579,414,796.16/122,368.62
  6. Step 6: Final answer
    x = 119,143.41

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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.