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Finding the Fourth Proportional to 127,405.20, 190,889.10 and 83,009.10

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Solution

The fourth proportional to 127,405.20, 190,889.10 and 83,009.10 is: 124,371.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,405.20 : 190,889.10 = 83,009.10 : x
  2. Step 2: Convert to fraction form
    127,405.20/190,889.10 = 83,009.10/x
  3. Step 3: Cross multiply
    127,405.20x = 190,889.10 × 83,009.10
  4. Step 4: Simplify right side
    127,405.20x = 15,845,532,390.81
  5. Step 5: Solve for x
    x = 15,845,532,390.81/127,405.20
  6. Step 6: Final answer
    x = 124,371.16

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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.