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Finding the Fourth Proportional to 70,236.80, 105,412.80 and 67,932.80

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Solution

The fourth proportional to 70,236.80, 105,412.80 and 67,932.80 is: 101,954.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,236.80 : 105,412.80 = 67,932.80 : x
  2. Step 2: Convert to fraction form
    70,236.80/105,412.80 = 67,932.80/x
  3. Step 3: Cross multiply
    70,236.80x = 105,412.80 × 67,932.80
  4. Step 4: Simplify right side
    70,236.80x = 7,160,986,659.84
  5. Step 5: Solve for x
    x = 7,160,986,659.84/70,236.80
  6. Step 6: Final answer
    x = 101,954.91

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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.