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Finding the Fourth Proportional to 70,394.70, 105,653.57 and 40,771.79

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Solution

The fourth proportional to 70,394.70, 105,653.57 and 40,771.79 is: 61,193.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,394.70 : 105,653.57 = 40,771.79 : x
  2. Step 2: Convert to fraction form
    70,394.70/105,653.57 = 40,771.79/x
  3. Step 3: Cross multiply
    70,394.70x = 105,653.57 × 40,771.79
  4. Step 4: Simplify right side
    70,394.70x = 4,307,684,832.86
  5. Step 5: Solve for x
    x = 4,307,684,832.86/70,394.70
  6. Step 6: Final answer
    x = 61,193.31

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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.