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Finding the Fourth Proportional to 73,147.85, 109,749.10 and 28,805.51

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Solution

The fourth proportional to 73,147.85, 109,749.10 and 28,805.51 is: 43,219.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,147.85 : 109,749.10 = 28,805.51 : x
  2. Step 2: Convert to fraction form
    73,147.85/109,749.10 = 28,805.51/x
  3. Step 3: Cross multiply
    73,147.85x = 109,749.10 × 28,805.51
  4. Step 4: Simplify right side
    73,147.85x = 3,161,378,999.90
  5. Step 5: Solve for x
    x = 3,161,378,999.90/73,147.85
  6. Step 6: Final answer
    x = 43,219.03

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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.