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Finding the Fourth Proportional to 212,698.99, 319,023.78 and 54,915.04

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Solution

The fourth proportional to 212,698.99, 319,023.78 and 54,915.04 is: 82,366.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,698.99 : 319,023.78 = 54,915.04 : x
  2. Step 2: Convert to fraction form
    212,698.99/319,023.78 = 54,915.04/x
  3. Step 3: Cross multiply
    212,698.99x = 319,023.78 × 54,915.04
  4. Step 4: Simplify right side
    212,698.99x = 17,519,203,639.65
  5. Step 5: Solve for x
    x = 17,519,203,639.65/212,698.99
  6. Step 6: Final answer
    x = 82,366.18

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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.