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Finding the Fourth Proportional to 74,683.95, 103,062.60 and 40,692.84

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Solution

The fourth proportional to 74,683.95, 103,062.60 and 40,692.84 is: 56,155.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,683.95 : 103,062.60 = 40,692.84 : x
  2. Step 2: Convert to fraction form
    74,683.95/103,062.60 = 40,692.84/x
  3. Step 3: Cross multiply
    74,683.95x = 103,062.60 × 40,692.84
  4. Step 4: Simplify right side
    74,683.95x = 4,193,909,891.78
  5. Step 5: Solve for x
    x = 4,193,909,891.78/74,683.95
  6. Step 6: Final answer
    x = 56,155.44

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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.