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Finding the Fourth Proportional to 80,657.37, 120,819.60 and 47,276.06

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Solution

The fourth proportional to 80,657.37, 120,819.60 and 47,276.06 is: 70,816.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,657.37 : 120,819.60 = 47,276.06 : x
  2. Step 2: Convert to fraction form
    80,657.37/120,819.60 = 47,276.06/x
  3. Step 3: Cross multiply
    80,657.37x = 120,819.60 × 47,276.06
  4. Step 4: Simplify right side
    80,657.37x = 5,711,874,054.68
  5. Step 5: Solve for x
    x = 5,711,874,054.68/80,657.37
  6. Step 6: Final answer
    x = 70,816.52

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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.