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Finding the Fourth Proportional to 138,604.40, 207,906.60 and 98,946.80

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Solution

The fourth proportional to 138,604.40, 207,906.60 and 98,946.80 is: 148,420.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,604.40 : 207,906.60 = 98,946.80 : x
  2. Step 2: Convert to fraction form
    138,604.40/207,906.60 = 98,946.80/x
  3. Step 3: Cross multiply
    138,604.40x = 207,906.60 × 98,946.80
  4. Step 4: Simplify right side
    138,604.40x = 20,571,692,768.88
  5. Step 5: Solve for x
    x = 20,571,692,768.88/138,604.40
  6. Step 6: Final answer
    x = 148,420.20

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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.