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Finding the Fourth Proportional to 120,830.48, 166,759.14 and 73,110.14

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Solution

The fourth proportional to 120,830.48, 166,759.14 and 73,110.14 is: 100,899.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,830.48 : 166,759.14 = 73,110.14 : x
  2. Step 2: Convert to fraction form
    120,830.48/166,759.14 = 73,110.14/x
  3. Step 3: Cross multiply
    120,830.48x = 166,759.14 × 73,110.14
  4. Step 4: Simplify right side
    120,830.48x = 12,191,784,071.68
  5. Step 5: Solve for x
    x = 12,191,784,071.68/120,830.48
  6. Step 6: Final answer
    x = 100,899.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.