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Finding the Fourth Proportional to 65,765.44, 90,734.89 and 40,245.18

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Solution

The fourth proportional to 65,765.44, 90,734.89 and 40,245.18 is: 55,525.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,765.44 : 90,734.89 = 40,245.18 : x
  2. Step 2: Convert to fraction form
    65,765.44/90,734.89 = 40,245.18/x
  3. Step 3: Cross multiply
    65,765.44x = 90,734.89 × 40,245.18
  4. Step 4: Simplify right side
    65,765.44x = 3,651,641,980.33
  5. Step 5: Solve for x
    x = 3,651,641,980.33/65,765.44
  6. Step 6: Final answer
    x = 55,525.24

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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.