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Finding the Fourth Proportional to 126,975.60, 190,074.60 and 91,983.60

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Solution

The fourth proportional to 126,975.60, 190,074.60 and 91,983.60 is: 137,693.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,975.60 : 190,074.60 = 91,983.60 : x
  2. Step 2: Convert to fraction form
    126,975.60/190,074.60 = 91,983.60/x
  3. Step 3: Cross multiply
    126,975.60x = 190,074.60 × 91,983.60
  4. Step 4: Simplify right side
    126,975.60x = 17,483,745,976.56
  5. Step 5: Solve for x
    x = 17,483,745,976.56/126,975.60
  6. Step 6: Final answer
    x = 137,693.75

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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.