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Finding the Fourth Proportional to 121,187.54, 181,781.42 and 57,992.83

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Solution

The fourth proportional to 121,187.54, 181,781.42 and 57,992.83 is: 86,989.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,187.54 : 181,781.42 = 57,992.83 : x
  2. Step 2: Convert to fraction form
    121,187.54/181,781.42 = 57,992.83/x
  3. Step 3: Cross multiply
    121,187.54x = 181,781.42 × 57,992.83
  4. Step 4: Simplify right side
    121,187.54x = 10,542,018,242.80
  5. Step 5: Solve for x
    x = 10,542,018,242.80/121,187.54
  6. Step 6: Final answer
    x = 86,989.29

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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.