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Finding the Fourth Proportional to 81,346.80, 121,825.80 and 65,794.80

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Solution

The fourth proportional to 81,346.80, 121,825.80 and 65,794.80 is: 98,534.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,346.80 : 121,825.80 = 65,794.80 : x
  2. Step 2: Convert to fraction form
    81,346.80/121,825.80 = 65,794.80/x
  3. Step 3: Cross multiply
    81,346.80x = 121,825.80 × 65,794.80
  4. Step 4: Simplify right side
    81,346.80x = 8,015,504,145.84
  5. Step 5: Solve for x
    x = 8,015,504,145.84/81,346.80
  6. Step 6: Final answer
    x = 98,534.97

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1.5x scale

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.