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Finding the Fourth Proportional to 118,967.45, 164,189.66 and 68,666.45

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Solution

The fourth proportional to 118,967.45, 164,189.66 and 68,666.45 is: 94,768.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,967.45 : 164,189.66 = 68,666.45 : x
  2. Step 2: Convert to fraction form
    118,967.45/164,189.66 = 68,666.45/x
  3. Step 3: Cross multiply
    118,967.45x = 164,189.66 × 68,666.45
  4. Step 4: Simplify right side
    118,967.45x = 11,274,319,914.63
  5. Step 5: Solve for x
    x = 11,274,319,914.63/118,967.45
  6. Step 6: Final answer
    x = 94,768.11

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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.