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Finding the Fourth Proportional to 125,971.20, 188,697.60 and 63,676.80

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Solution

The fourth proportional to 125,971.20, 188,697.60 and 63,676.80 is: 95,384.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,971.20 : 188,697.60 = 63,676.80 : x
  2. Step 2: Convert to fraction form
    125,971.20/188,697.60 = 63,676.80/x
  3. Step 3: Cross multiply
    125,971.20x = 188,697.60 × 63,676.80
  4. Step 4: Simplify right side
    125,971.20x = 12,015,659,335.68
  5. Step 5: Solve for x
    x = 12,015,659,335.68/125,971.20
  6. Step 6: Final answer
    x = 95,384.18

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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.