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Finding the Fourth Proportional to 253,927.80, 380,907.36 and 66,939.30

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Solution

The fourth proportional to 253,927.80, 380,907.36 and 66,939.30 is: 100,413.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,927.80 : 380,907.36 = 66,939.30 : x
  2. Step 2: Convert to fraction form
    253,927.80/380,907.36 = 66,939.30/x
  3. Step 3: Cross multiply
    253,927.80x = 380,907.36 × 66,939.30
  4. Step 4: Simplify right side
    253,927.80x = 25,497,672,043.25
  5. Step 5: Solve for x
    x = 25,497,672,043.25/253,927.80
  6. Step 6: Final answer
    x = 100,413.08

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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.