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Finding the Fourth Proportional to 190,362.80, 285,414.60 and 72,016.40

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Solution

The fourth proportional to 190,362.80, 285,414.60 and 72,016.40 is: 107,975.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,362.80 : 285,414.60 = 72,016.40 : x
  2. Step 2: Convert to fraction form
    190,362.80/285,414.60 = 72,016.40/x
  3. Step 3: Cross multiply
    190,362.80x = 285,414.60 × 72,016.40
  4. Step 4: Simplify right side
    190,362.80x = 20,554,531,999.44
  5. Step 5: Solve for x
    x = 20,554,531,999.44/190,362.80
  6. Step 6: Final answer
    x = 107,975.57

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1.5x scale

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.