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Finding the Fourth Proportional to 76,958.44, 105,965.76 and 65,602.48

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Solution

The fourth proportional to 76,958.44, 105,965.76 and 65,602.48 is: 90,329.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,958.44 : 105,965.76 = 65,602.48 : x
  2. Step 2: Convert to fraction form
    76,958.44/105,965.76 = 65,602.48/x
  3. Step 3: Cross multiply
    76,958.44x = 105,965.76 × 65,602.48
  4. Step 4: Simplify right side
    76,958.44x = 6,951,616,651.08
  5. Step 5: Solve for x
    x = 6,951,616,651.08/76,958.44
  6. Step 6: Final answer
    x = 90,329.49

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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.