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Finding the Fourth Proportional to 129,975.60, 195,028.20 and 73,858.80

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Solution

The fourth proportional to 129,975.60, 195,028.20 and 73,858.80 is: 110,825.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,975.60 : 195,028.20 = 73,858.80 : x
  2. Step 2: Convert to fraction form
    129,975.60/195,028.20 = 73,858.80/x
  3. Step 3: Cross multiply
    129,975.60x = 195,028.20 × 73,858.80
  4. Step 4: Simplify right side
    129,975.60x = 14,404,548,818.16
  5. Step 5: Solve for x
    x = 14,404,548,818.16/129,975.60
  6. Step 6: Final answer
    x = 110,825.02

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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.