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Finding the Fourth Proportional to 70,604.49, 105,957.72 and 40,982.79

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Solution

The fourth proportional to 70,604.49, 105,957.72 and 40,982.79 is: 61,503.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,604.49 : 105,957.72 = 40,982.79 : x
  2. Step 2: Convert to fraction form
    70,604.49/105,957.72 = 40,982.79/x
  3. Step 3: Cross multiply
    70,604.49x = 105,957.72 × 40,982.79
  4. Step 4: Simplify right side
    70,604.49x = 4,342,442,987.64
  5. Step 5: Solve for x
    x = 4,342,442,987.64/70,604.49
  6. Step 6: Final answer
    x = 61,503.78

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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.