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Finding the Fourth Proportional to 151,940.70, 209,635.44 and 87,406.56

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Solution

The fourth proportional to 151,940.70, 209,635.44 and 87,406.56 is: 120,596.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,940.70 : 209,635.44 = 87,406.56 : x
  2. Step 2: Convert to fraction form
    151,940.70/209,635.44 = 87,406.56/x
  3. Step 3: Cross multiply
    151,940.70x = 209,635.44 × 87,406.56
  4. Step 4: Simplify right side
    151,940.70x = 18,323,512,664.49
  5. Step 5: Solve for x
    x = 18,323,512,664.49/151,940.70
  6. Step 6: Final answer
    x = 120,596.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.