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Finding the Fourth Proportional to 53,274.70, 79,908.91 and 19,991.95

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Solution

The fourth proportional to 53,274.70, 79,908.91 and 19,991.95 is: 29,986.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,274.70 : 79,908.91 = 19,991.95 : x
  2. Step 2: Convert to fraction form
    53,274.70/79,908.91 = 19,991.95/x
  3. Step 3: Cross multiply
    53,274.70x = 79,908.91 × 19,991.95
  4. Step 4: Simplify right side
    53,274.70x = 1,597,534,933.27
  5. Step 5: Solve for x
    x = 1,597,534,933.27/53,274.70
  6. Step 6: Final answer
    x = 29,986.75

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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.