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Finding the Fourth Proportional to 70,262.79, 105,394.37 and 28,709.79

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Solution

The fourth proportional to 70,262.79, 105,394.37 and 28,709.79 is: 43,064.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,262.79 : 105,394.37 = 28,709.79 : x
  2. Step 2: Convert to fraction form
    70,262.79/105,394.37 = 28,709.79/x
  3. Step 3: Cross multiply
    70,262.79x = 105,394.37 × 28,709.79
  4. Step 4: Simplify right side
    70,262.79x = 3,025,850,086.33
  5. Step 5: Solve for x
    x = 3,025,850,086.33/70,262.79
  6. Step 6: Final answer
    x = 43,064.76

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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.