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Finding the Fourth Proportional to 67,314.85, 100,990.45 and 20,566.45

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Solution

The fourth proportional to 67,314.85, 100,990.45 and 20,566.45 is: 30,855.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,314.85 : 100,990.45 = 20,566.45 : x
  2. Step 2: Convert to fraction form
    67,314.85/100,990.45 = 20,566.45/x
  3. Step 3: Cross multiply
    67,314.85x = 100,990.45 × 20,566.45
  4. Step 4: Simplify right side
    67,314.85x = 2,077,015,040.40
  5. Step 5: Solve for x
    x = 2,077,015,040.40/67,314.85
  6. Step 6: Final answer
    x = 30,855.23

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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.