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Finding the Fourth Proportional to 100,993.35, 151,392.83 and 78,491.55

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Solution

The fourth proportional to 100,993.35, 151,392.83 and 78,491.55 is: 117,661.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,993.35 : 151,392.83 = 78,491.55 : x
  2. Step 2: Convert to fraction form
    100,993.35/151,392.83 = 78,491.55/x
  3. Step 3: Cross multiply
    100,993.35x = 151,392.83 × 78,491.55
  4. Step 4: Simplify right side
    100,993.35x = 11,883,057,493.13
  5. Step 5: Solve for x
    x = 11,883,057,493.13/100,993.35
  6. Step 6: Final answer
    x = 117,661.78

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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.