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Finding the Fourth Proportional to 100,040.56, 137,990.48 and 59,722.80

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Solution

The fourth proportional to 100,040.56, 137,990.48 and 59,722.80 is: 82,378.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,040.56 : 137,990.48 = 59,722.80 : x
  2. Step 2: Convert to fraction form
    100,040.56/137,990.48 = 59,722.80/x
  3. Step 3: Cross multiply
    100,040.56x = 137,990.48 × 59,722.80
  4. Step 4: Simplify right side
    100,040.56x = 8,241,177,838.94
  5. Step 5: Solve for x
    x = 8,241,177,838.94/100,040.56
  6. Step 6: Final answer
    x = 82,378.37

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1.5x scale

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.