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Finding the Fourth Proportional to 43,991.20, 65,986.80 and 25,328.80

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Solution

The fourth proportional to 43,991.20, 65,986.80 and 25,328.80 is: 37,993.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,991.20 : 65,986.80 = 25,328.80 : x
  2. Step 2: Convert to fraction form
    43,991.20/65,986.80 = 25,328.80/x
  3. Step 3: Cross multiply
    43,991.20x = 65,986.80 × 25,328.80
  4. Step 4: Simplify right side
    43,991.20x = 1,671,366,459.84
  5. Step 5: Solve for x
    x = 1,671,366,459.84/43,991.20
  6. Step 6: Final answer
    x = 37,993.20

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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.