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Finding the Fourth Proportional to 98,793.90, 136,334.40 and 53,470.80

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Solution

The fourth proportional to 98,793.90, 136,334.40 and 53,470.80 is: 73,789.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,793.90 : 136,334.40 = 53,470.80 : x
  2. Step 2: Convert to fraction form
    98,793.90/136,334.40 = 53,470.80/x
  3. Step 3: Cross multiply
    98,793.90x = 136,334.40 × 53,470.80
  4. Step 4: Simplify right side
    98,793.90x = 7,289,909,435.52
  5. Step 5: Solve for x
    x = 7,289,909,435.52/98,793.90
  6. Step 6: Final answer
    x = 73,789.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.