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Finding the Fourth Proportional to 118,970.67, 178,218.08 and 71,559.59

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Solution

The fourth proportional to 118,970.67, 178,218.08 and 71,559.59 is: 107,196.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,970.67 : 178,218.08 = 71,559.59 : x
  2. Step 2: Convert to fraction form
    118,970.67/178,218.08 = 71,559.59/x
  3. Step 3: Cross multiply
    118,970.67x = 178,218.08 × 71,559.59
  4. Step 4: Simplify right side
    118,970.67x = 12,753,211,486.50
  5. Step 5: Solve for x
    x = 12,753,211,486.50/118,970.67
  6. Step 6: Final answer
    x = 107,196.27

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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.