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Finding the Fourth Proportional to 70,289.06, 105,433.70 and 28,736.06

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Solution

The fourth proportional to 70,289.06, 105,433.70 and 28,736.06 is: 43,104.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,289.06 : 105,433.70 = 28,736.06 : x
  2. Step 2: Convert to fraction form
    70,289.06/105,433.70 = 28,736.06/x
  3. Step 3: Cross multiply
    70,289.06x = 105,433.70 × 28,736.06
  4. Step 4: Simplify right side
    70,289.06x = 3,029,749,129.22
  5. Step 5: Solve for x
    x = 3,029,749,129.22/70,289.06
  6. Step 6: Final answer
    x = 43,104.13

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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.