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Finding the Fourth Proportional to 74,790.80, 112,109.40 and 41,459.60

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Solution

The fourth proportional to 74,790.80, 112,109.40 and 41,459.60 is: 62,146.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,790.80 : 112,109.40 = 41,459.60 : x
  2. Step 2: Convert to fraction form
    74,790.80/112,109.40 = 41,459.60/x
  3. Step 3: Cross multiply
    74,790.80x = 112,109.40 × 41,459.60
  4. Step 4: Simplify right side
    74,790.80x = 4,648,010,880.24
  5. Step 5: Solve for x
    x = 4,648,010,880.24/74,790.80
  6. Step 6: Final answer
    x = 62,146.83

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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.