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Finding the Fourth Proportional to 72,975.96, 100,706.94 and 39,441.96

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Solution

The fourth proportional to 72,975.96, 100,706.94 and 39,441.96 is: 54,429.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,975.96 : 100,706.94 = 39,441.96 : x
  2. Step 2: Convert to fraction form
    72,975.96/100,706.94 = 39,441.96/x
  3. Step 3: Cross multiply
    72,975.96x = 100,706.94 × 39,441.96
  4. Step 4: Simplify right side
    72,975.96x = 3,972,079,099.20
  5. Step 5: Solve for x
    x = 3,972,079,099.20/72,975.96
  6. Step 6: Final answer
    x = 54,429.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.