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Finding the Fourth Proportional to 80,765.80, 121,148.70 and 41,309.80

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Solution

The fourth proportional to 80,765.80, 121,148.70 and 41,309.80 is: 61,964.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,765.80 : 121,148.70 = 41,309.80 : x
  2. Step 2: Convert to fraction form
    80,765.80/121,148.70 = 41,309.80/x
  3. Step 3: Cross multiply
    80,765.80x = 121,148.70 × 41,309.80
  4. Step 4: Simplify right side
    80,765.80x = 5,004,628,567.26
  5. Step 5: Solve for x
    x = 5,004,628,567.26/80,765.80
  6. Step 6: Final answer
    x = 61,964.70

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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.