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Finding the Fourth Proportional to 78,268.52, 108,020.31 and 51,433.22

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Solution

The fourth proportional to 78,268.52, 108,020.31 and 51,433.22 is: 70,984.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,268.52 : 108,020.31 = 51,433.22 : x
  2. Step 2: Convert to fraction form
    78,268.52/108,020.31 = 51,433.22/x
  3. Step 3: Cross multiply
    78,268.52x = 108,020.31 × 51,433.22
  4. Step 4: Simplify right side
    78,268.52x = 5,555,832,368.70
  5. Step 5: Solve for x
    x = 5,555,832,368.70/78,268.52
  6. Step 6: Final answer
    x = 70,984.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.