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Finding the Fourth Proportional to 72,703.78, 108,975.02 and 30,571.37

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Solution

The fourth proportional to 72,703.78, 108,975.02 and 30,571.37 is: 45,823.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,703.78 : 108,975.02 = 30,571.37 : x
  2. Step 2: Convert to fraction form
    72,703.78/108,975.02 = 30,571.37/x
  3. Step 3: Cross multiply
    72,703.78x = 108,975.02 × 30,571.37
  4. Step 4: Simplify right side
    72,703.78x = 3,331,516,153.05
  5. Step 5: Solve for x
    x = 3,331,516,153.05/72,703.78
  6. Step 6: Final answer
    x = 45,823.15

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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.