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Finding the Fourth Proportional to 96,801.60, 145,029.60 and 81,940.80

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Solution

The fourth proportional to 96,801.60, 145,029.60 and 81,940.80 is: 122,764.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,801.60 : 145,029.60 = 81,940.80 : x
  2. Step 2: Convert to fraction form
    96,801.60/145,029.60 = 81,940.80/x
  3. Step 3: Cross multiply
    96,801.60x = 145,029.60 × 81,940.80
  4. Step 4: Simplify right side
    96,801.60x = 11,883,841,447.68
  5. Step 5: Solve for x
    x = 11,883,841,447.68/96,801.60
  6. Step 6: Final answer
    x = 122,764.93

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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.