Home / 68,293.32-102,455.21-20,915.07

Finding the Fourth Proportional to 68,293.32, 102,455.21 and 20,915.07

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Solution

The fourth proportional to 68,293.32, 102,455.21 and 20,915.07 is: 31,377.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,293.32 : 102,455.21 = 20,915.07 : x
  2. Step 2: Convert to fraction form
    68,293.32/102,455.21 = 20,915.07/x
  3. Step 3: Cross multiply
    68,293.32x = 102,455.21 × 20,915.07
  4. Step 4: Simplify right side
    68,293.32x = 2,142,857,784.44
  5. Step 5: Solve for x
    x = 2,142,857,784.44/68,293.32
  6. Step 6: Final answer
    x = 31,377.27

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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.