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Finding the Fourth Proportional to 84,645.90, 118,766.70 and 84,645.90

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Solution

The fourth proportional to 84,645.90, 118,766.70 and 84,645.90 is: 118,766.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,645.90 : 118,766.70 = 84,645.90 : x
  2. Step 2: Convert to fraction form
    84,645.90/118,766.70 = 84,645.90/x
  3. Step 3: Cross multiply
    84,645.90x = 118,766.70 × 84,645.90
  4. Step 4: Simplify right side
    84,645.90x = 10,053,114,211.53
  5. Step 5: Solve for x
    x = 10,053,114,211.53/84,645.90
  6. Step 6: Final answer
    x = 118,766.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.