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Finding the Fourth Proportional to 65,765.94, 90,735.59 and 40,245.68

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Solution

The fourth proportional to 65,765.94, 90,735.59 and 40,245.68 is: 55,525.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,765.94 : 90,735.59 = 40,245.68 : x
  2. Step 2: Convert to fraction form
    65,765.94/90,735.59 = 40,245.68/x
  3. Step 3: Cross multiply
    65,765.94x = 90,735.59 × 40,245.68
  4. Step 4: Simplify right side
    65,765.94x = 3,651,714,864.84
  5. Step 5: Solve for x
    x = 3,651,714,864.84/65,765.94
  6. Step 6: Final answer
    x = 55,525.93

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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.