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Finding the Fourth Proportional to 128,094.40, 192,042.10 and 83,020.60

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Solution

The fourth proportional to 128,094.40, 192,042.10 and 83,020.60 is: 124,466.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,094.40 : 192,042.10 = 83,020.60 : x
  2. Step 2: Convert to fraction form
    128,094.40/192,042.10 = 83,020.60/x
  3. Step 3: Cross multiply
    128,094.40x = 192,042.10 × 83,020.60
  4. Step 4: Simplify right side
    128,094.40x = 15,943,450,367.26
  5. Step 5: Solve for x
    x = 15,943,450,367.26/128,094.40
  6. Step 6: Final answer
    x = 124,466.41

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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.