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Finding the Fourth Proportional to 121,111.88, 181,697.18 and 38,005.88

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Solution

The fourth proportional to 121,111.88, 181,697.18 and 38,005.88 is: 57,018.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,111.88 : 181,697.18 = 38,005.88 : x
  2. Step 2: Convert to fraction form
    121,111.88/181,697.18 = 38,005.88/x
  3. Step 3: Cross multiply
    121,111.88x = 181,697.18 × 38,005.88
  4. Step 4: Simplify right side
    121,111.88x = 6,905,560,120.90
  5. Step 5: Solve for x
    x = 6,905,560,120.90/121,111.88
  6. Step 6: Final answer
    x = 57,018.03

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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.