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Finding the Fourth Proportional to 74,143.22, 111,205.71 and 43,765.79

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Solution

The fourth proportional to 74,143.22, 111,205.71 and 43,765.79 is: 65,643.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,143.22 : 111,205.71 = 43,765.79 : x
  2. Step 2: Convert to fraction form
    74,143.22/111,205.71 = 43,765.79/x
  3. Step 3: Cross multiply
    74,143.22x = 111,205.71 × 43,765.79
  4. Step 4: Simplify right side
    74,143.22x = 4,867,005,194.63
  5. Step 5: Solve for x
    x = 4,867,005,194.63/74,143.22
  6. Step 6: Final answer
    x = 65,643.30

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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.