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Finding the Fourth Proportional to 122,920.74, 184,387.59 and 70,380.90

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Solution

The fourth proportional to 122,920.74, 184,387.59 and 70,380.90 is: 105,575.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,920.74 : 184,387.59 = 70,380.90 : x
  2. Step 2: Convert to fraction form
    122,920.74/184,387.59 = 70,380.90/x
  3. Step 3: Cross multiply
    122,920.74x = 184,387.59 × 70,380.90
  4. Step 4: Simplify right side
    122,920.74x = 12,977,364,533.03
  5. Step 5: Solve for x
    x = 12,977,364,533.03/122,920.74
  6. Step 6: Final answer
    x = 105,575.06

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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.