Home / 131,994.80-197,723.40-81,921.20

Finding the Fourth Proportional to 131,994.80, 197,723.40 and 81,921.20

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Solution

The fourth proportional to 131,994.80, 197,723.40 and 81,921.20 is: 122,714.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,994.80 : 197,723.40 = 81,921.20 : x
  2. Step 2: Convert to fraction form
    131,994.80/197,723.40 = 81,921.20/x
  3. Step 3: Cross multiply
    131,994.80x = 197,723.40 × 81,921.20
  4. Step 4: Simplify right side
    131,994.80x = 16,197,738,196.08
  5. Step 5: Solve for x
    x = 16,197,738,196.08/131,994.80
  6. Step 6: Final answer
    x = 122,714.97

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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.