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Finding the Fourth Proportional to 70,289.34, 105,434.07 and 28,736.34

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Solution

The fourth proportional to 70,289.34, 105,434.07 and 28,736.34 is: 43,104.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,289.34 : 105,434.07 = 28,736.34 : x
  2. Step 2: Convert to fraction form
    70,289.34/105,434.07 = 28,736.34/x
  3. Step 3: Cross multiply
    70,289.34x = 105,434.07 × 28,736.34
  4. Step 4: Simplify right side
    70,289.34x = 3,029,789,283.10
  5. Step 5: Solve for x
    x = 3,029,789,283.10/70,289.34
  6. Step 6: Final answer
    x = 43,104.53

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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.