Home / 212,856,870.40-319,285,305.60-131,815,052.80

Finding the Fourth Proportional to 212,856,870.40, 319,285,305.60 and 131,815,052.80

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Solution

The fourth proportional to 212,856,870.40, 319,285,305.60 and 131,815,052.80 is: 197,722,579.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,856,870.40 : 319,285,305.60 = 131,815,052.80 : x
  2. Step 2: Convert to fraction form
    212,856,870.40/319,285,305.60 = 131,815,052.80/x
  3. Step 3: Cross multiply
    212,856,870.40x = 319,285,305.60 × 131,815,052.80
  4. Step 4: Simplify right side
    212,856,870.40x = 42,086,609,415,928,136
  5. Step 5: Solve for x
    x = 42,086,609,415,928,136/212,856,870.40
  6. Step 6: Final answer
    x = 197,722,579.20

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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.