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Finding the Fourth Proportional to 208,560.60, 312,905.70 and 82,216.80

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Solution

The fourth proportional to 208,560.60, 312,905.70 and 82,216.80 is: 123,350.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,560.60 : 312,905.70 = 82,216.80 : x
  2. Step 2: Convert to fraction form
    208,560.60/312,905.70 = 82,216.80/x
  3. Step 3: Cross multiply
    208,560.60x = 312,905.70 × 82,216.80
  4. Step 4: Simplify right side
    208,560.60x = 25,726,105,355.76
  5. Step 5: Solve for x
    x = 25,726,105,355.76/208,560.60
  6. Step 6: Final answer
    x = 123,350.74

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1.5x scale

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.