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Finding the Fourth Proportional to 127,238.80, 190,469.40 and 99,245.20

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Solution

The fourth proportional to 127,238.80, 190,469.40 and 99,245.20 is: 148,564.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,238.80 : 190,469.40 = 99,245.20 : x
  2. Step 2: Convert to fraction form
    127,238.80/190,469.40 = 99,245.20/x
  3. Step 3: Cross multiply
    127,238.80x = 190,469.40 × 99,245.20
  4. Step 4: Simplify right side
    127,238.80x = 18,903,173,696.88
  5. Step 5: Solve for x
    x = 18,903,173,696.88/127,238.80
  6. Step 6: Final answer
    x = 148,564.54

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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.