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Finding the Fourth Proportional to 170,053.02, 255,073.86 and 91,321.02

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Solution

The fourth proportional to 170,053.02, 255,073.86 and 91,321.02 is: 136,978.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,053.02 : 255,073.86 = 91,321.02 : x
  2. Step 2: Convert to fraction form
    170,053.02/255,073.86 = 91,321.02/x
  3. Step 3: Cross multiply
    170,053.02x = 255,073.86 × 91,321.02
  4. Step 4: Simplify right side
    170,053.02x = 23,293,605,070.54
  5. Step 5: Solve for x
    x = 23,293,605,070.54/170,053.02
  6. Step 6: Final answer
    x = 136,978.49

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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.