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Finding the Fourth Proportional to 127,906.20, 192,032.10 and 81,250.20

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Solution

The fourth proportional to 127,906.20, 192,032.10 and 81,250.20 is: 121,985.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,906.20 : 192,032.10 = 81,250.20 : x
  2. Step 2: Convert to fraction form
    127,906.20/192,032.10 = 81,250.20/x
  3. Step 3: Cross multiply
    127,906.20x = 192,032.10 × 81,250.20
  4. Step 4: Simplify right side
    127,906.20x = 15,602,646,531.42
  5. Step 5: Solve for x
    x = 15,602,646,531.42/127,906.20
  6. Step 6: Final answer
    x = 121,985.07

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1.5x scale

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.