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Finding the Fourth Proportional to 63,991.20, 95,986.80 and 40,720.80

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Solution

The fourth proportional to 63,991.20, 95,986.80 and 40,720.80 is: 61,081.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,991.20 : 95,986.80 = 40,720.80 : x
  2. Step 2: Convert to fraction form
    63,991.20/95,986.80 = 40,720.80/x
  3. Step 3: Cross multiply
    63,991.20x = 95,986.80 × 40,720.80
  4. Step 4: Simplify right side
    63,991.20x = 3,908,659,285.44
  5. Step 5: Solve for x
    x = 3,908,659,285.44/63,991.20
  6. Step 6: Final answer
    x = 61,081.20

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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.