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Finding the Fourth Proportional to 44,172, 66,279.26 and 21,987.32

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Solution

The fourth proportional to 44,172, 66,279.26 and 21,987.32 is: 32,991.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    44,172 : 66,279.26 = 21,987.32 : x
  2. Step 2: Convert to fraction form
    44,172/66,279.26 = 21,987.32/x
  3. Step 3: Cross multiply
    44,172x = 66,279.26 × 21,987.32
  4. Step 4: Simplify right side
    44,172x = 1,457,303,022.56
  5. Step 5: Solve for x
    x = 1,457,303,022.56/44,172
  6. Step 6: Final answer
    x = 32,991.56

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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.