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Finding the Fourth Proportional to 212,640.49, 319,094.24 and 86,281.24

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Solution

The fourth proportional to 212,640.49, 319,094.24 and 86,281.24 is: 129,476.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,640.49 : 319,094.24 = 86,281.24 : x
  2. Step 2: Convert to fraction form
    212,640.49/319,094.24 = 86,281.24/x
  3. Step 3: Cross multiply
    212,640.49x = 319,094.24 × 86,281.24
  4. Step 4: Simplify right side
    212,640.49x = 27,531,846,704.06
  5. Step 5: Solve for x
    x = 27,531,846,704.06/212,640.49
  6. Step 6: Final answer
    x = 129,476.03

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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.