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Finding the Fourth Proportional to 102,911.20, 154,309.20 and 43,736.80

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Solution

The fourth proportional to 102,911.20, 154,309.20 and 43,736.80 is: 65,580.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,911.20 : 154,309.20 = 43,736.80 : x
  2. Step 2: Convert to fraction form
    102,911.20/154,309.20 = 43,736.80/x
  3. Step 3: Cross multiply
    102,911.20x = 154,309.20 × 43,736.80
  4. Step 4: Simplify right side
    102,911.20x = 6,748,990,618.56
  5. Step 5: Solve for x
    x = 6,748,990,618.56/102,911.20
  6. Step 6: Final answer
    x = 65,580.72

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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.