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Finding the Fourth Proportional to 212,610.20, 318,915.30 and 123,963.80

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Solution

The fourth proportional to 212,610.20, 318,915.30 and 123,963.80 is: 185,945.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,610.20 : 318,915.30 = 123,963.80 : x
  2. Step 2: Convert to fraction form
    212,610.20/318,915.30 = 123,963.80/x
  3. Step 3: Cross multiply
    212,610.20x = 318,915.30 × 123,963.80
  4. Step 4: Simplify right side
    212,610.20x = 39,533,952,466.14
  5. Step 5: Solve for x
    x = 39,533,952,466.14/212,610.20
  6. Step 6: Final answer
    x = 185,945.70

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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.