Home / 43,821.20-65,731.80-31,379.60

Finding the Fourth Proportional to 43,821.20, 65,731.80 and 31,379.60

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Solution

The fourth proportional to 43,821.20, 65,731.80 and 31,379.60 is: 47,069.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,821.20 : 65,731.80 = 31,379.60 : x
  2. Step 2: Convert to fraction form
    43,821.20/65,731.80 = 31,379.60/x
  3. Step 3: Cross multiply
    43,821.20x = 65,731.80 × 31,379.60
  4. Step 4: Simplify right side
    43,821.20x = 2,062,637,591.28
  5. Step 5: Solve for x
    x = 2,062,637,591.28/43,821.20
  6. Step 6: Final answer
    x = 47,069.40

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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.