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Finding the Fourth Proportional to 53,273.70, 79,907.41 and 19,990.95

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Solution

The fourth proportional to 53,273.70, 79,907.41 and 19,990.95 is: 29,985.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,273.70 : 79,907.41 = 19,990.95 : x
  2. Step 2: Convert to fraction form
    53,273.70/79,907.41 = 19,990.95/x
  3. Step 3: Cross multiply
    53,273.70x = 79,907.41 × 19,990.95
  4. Step 4: Simplify right side
    53,273.70x = 1,597,425,212.75
  5. Step 5: Solve for x
    x = 1,597,425,212.75/53,273.70
  6. Step 6: Final answer
    x = 29,985.25

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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.