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Finding the Fourth Proportional to 71,966.80, 107,804.40 and 40,765.60

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Solution

The fourth proportional to 71,966.80, 107,804.40 and 40,765.60 is: 61,065.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,966.80 : 107,804.40 = 40,765.60 : x
  2. Step 2: Convert to fraction form
    71,966.80/107,804.40 = 40,765.60/x
  3. Step 3: Cross multiply
    71,966.80x = 107,804.40 × 40,765.60
  4. Step 4: Simplify right side
    71,966.80x = 4,394,711,048.64
  5. Step 5: Solve for x
    x = 4,394,711,048.64/71,966.80
  6. Step 6: Final answer
    x = 61,065.81

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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.