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Finding the Fourth Proportional to 136,573.60, 204,975.60 and 66,512.80

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Solution

The fourth proportional to 136,573.60, 204,975.60 and 66,512.80 is: 99,825.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,573.60 : 204,975.60 = 66,512.80 : x
  2. Step 2: Convert to fraction form
    136,573.60/204,975.60 = 66,512.80/x
  3. Step 3: Cross multiply
    136,573.60x = 204,975.60 × 66,512.80
  4. Step 4: Simplify right side
    136,573.60x = 13,633,501,087.68
  5. Step 5: Solve for x
    x = 13,633,501,087.68/136,573.60
  6. Step 6: Final answer
    x = 99,825.30

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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.