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Finding the Fourth Proportional to 74,633.55, 111,965.09 and 21,326.01

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Solution

The fourth proportional to 74,633.55, 111,965.09 and 21,326.01 is: 31,993.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,633.55 : 111,965.09 = 21,326.01 : x
  2. Step 2: Convert to fraction form
    74,633.55/111,965.09 = 21,326.01/x
  3. Step 3: Cross multiply
    74,633.55x = 111,965.09 × 21,326.01
  4. Step 4: Simplify right side
    74,633.55x = 2,387,768,628.99
  5. Step 5: Solve for x
    x = 2,387,768,628.99/74,633.55
  6. Step 6: Final answer
    x = 31,993.23

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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.