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Finding the Fourth Proportional to 74,789.60, 112,107.60 and 43,608.80

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Solution

The fourth proportional to 74,789.60, 112,107.60 and 43,608.80 is: 65,368.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,789.60 : 112,107.60 = 43,608.80 : x
  2. Step 2: Convert to fraction form
    74,789.60/112,107.60 = 43,608.80/x
  3. Step 3: Cross multiply
    74,789.60x = 112,107.60 × 43,608.80
  4. Step 4: Simplify right side
    74,789.60x = 4,888,877,906.88
  5. Step 5: Solve for x
    x = 4,888,877,906.88/74,789.60
  6. Step 6: Final answer
    x = 65,368.42

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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.