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Finding the Fourth Proportional to 74,773.60, 112,221.60 and 74,190.40

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Solution

The fourth proportional to 74,773.60, 112,221.60 and 74,190.40 is: 111,346.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,773.60 : 112,221.60 = 74,190.40 : x
  2. Step 2: Convert to fraction form
    74,773.60/112,221.60 = 74,190.40/x
  3. Step 3: Cross multiply
    74,773.60x = 112,221.60 × 74,190.40
  4. Step 4: Simplify right side
    74,773.60x = 8,325,765,392.64
  5. Step 5: Solve for x
    x = 8,325,765,392.64/74,773.60
  6. Step 6: Final answer
    x = 111,346.32

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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.