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Finding the Fourth Proportional to 213,099.80, 319,260.90 and 173,442.20

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Solution

The fourth proportional to 213,099.80, 319,260.90 and 173,442.20 is: 259,846.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,099.80 : 319,260.90 = 173,442.20 : x
  2. Step 2: Convert to fraction form
    213,099.80/319,260.90 = 173,442.20/x
  3. Step 3: Cross multiply
    213,099.80x = 319,260.90 × 173,442.20
  4. Step 4: Simplify right side
    213,099.80x = 55,373,312,869.98
  5. Step 5: Solve for x
    x = 55,373,312,869.98/213,099.80
  6. Step 6: Final answer
    x = 259,846.86

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1.5x scale

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.