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Finding the Fourth Proportional to 98,791.90, 136,331.64 and 53,468.80

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Solution

The fourth proportional to 98,791.90, 136,331.64 and 53,468.80 is: 73,786.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,791.90 : 136,331.64 = 53,468.80 : x
  2. Step 2: Convert to fraction form
    98,791.90/136,331.64 = 53,468.80/x
  3. Step 3: Cross multiply
    98,791.90x = 136,331.64 × 53,468.80
  4. Step 4: Simplify right side
    98,791.90x = 7,289,488,852.00
  5. Step 5: Solve for x
    x = 7,289,488,852.00/98,791.90
  6. Step 6: Final answer
    x = 73,786.30

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1.5x scale

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.