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Finding the Fourth Proportional to 116,673.40, 160,980.78 and 65,675.80

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Solution

The fourth proportional to 116,673.40, 160,980.78 and 65,675.80 is: 90,616.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,673.40 : 160,980.78 = 65,675.80 : x
  2. Step 2: Convert to fraction form
    116,673.40/160,980.78 = 65,675.80/x
  3. Step 3: Cross multiply
    116,673.40x = 160,980.78 × 65,675.80
  4. Step 4: Simplify right side
    116,673.40x = 10,572,541,511.12
  5. Step 5: Solve for x
    x = 10,572,541,511.12/116,673.40
  6. Step 6: Final answer
    x = 90,616.55

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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.