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Finding the Fourth Proportional to 72,927.38, 100,639.87 and 39,393.38

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Solution

The fourth proportional to 72,927.38, 100,639.87 and 39,393.38 is: 54,362.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,927.38 : 100,639.87 = 39,393.38 : x
  2. Step 2: Convert to fraction form
    72,927.38/100,639.87 = 39,393.38/x
  3. Step 3: Cross multiply
    72,927.38x = 100,639.87 × 39,393.38
  4. Step 4: Simplify right side
    72,927.38x = 3,964,544,040.38
  5. Step 5: Solve for x
    x = 3,964,544,040.38/72,927.38
  6. Step 6: Final answer
    x = 54,362.91

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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.