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Finding the Fourth Proportional to 246,915.67, 340,738.72 and 138,019.47

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Solution

The fourth proportional to 246,915.67, 340,738.72 and 138,019.47 is: 190,464.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    246,915.67 : 340,738.72 = 138,019.47 : x
  2. Step 2: Convert to fraction form
    246,915.67/340,738.72 = 138,019.47/x
  3. Step 3: Cross multiply
    246,915.67x = 340,738.72 × 138,019.47
  4. Step 4: Simplify right side
    246,915.67x = 47,028,577,542.88
  5. Step 5: Solve for x
    x = 47,028,577,542.88/246,915.67
  6. Step 6: Final answer
    x = 190,464.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.