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Finding the Fourth Proportional to 72,728.75, 100,366.29 and 40,897.37

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Solution

The fourth proportional to 72,728.75, 100,366.29 and 40,897.37 is: 56,438.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,728.75 : 100,366.29 = 40,897.37 : x
  2. Step 2: Convert to fraction form
    72,728.75/100,366.29 = 40,897.37/x
  3. Step 3: Cross multiply
    72,728.75x = 100,366.29 × 40,897.37
  4. Step 4: Simplify right side
    72,728.75x = 4,104,716,795.83
  5. Step 5: Solve for x
    x = 4,104,716,795.83/72,728.75
  6. Step 6: Final answer
    x = 56,438.71

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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.