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Finding the Fourth Proportional to 112,190.40, 168,201.90 and 67,807.80

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Solution

The fourth proportional to 112,190.40, 168,201.90 and 67,807.80 is: 101,661.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,190.40 : 168,201.90 = 67,807.80 : x
  2. Step 2: Convert to fraction form
    112,190.40/168,201.90 = 67,807.80/x
  3. Step 3: Cross multiply
    112,190.40x = 168,201.90 × 67,807.80
  4. Step 4: Simplify right side
    112,190.40x = 11,405,400,794.82
  5. Step 5: Solve for x
    x = 11,405,400,794.82/112,190.40
  6. Step 6: Final answer
    x = 101,661.11

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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.