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Finding the Fourth Proportional to 122,308.31, 168,803.91 and 74,589.33

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Solution

The fourth proportional to 122,308.31, 168,803.91 and 74,589.33 is: 102,944.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,308.31 : 168,803.91 = 74,589.33 : x
  2. Step 2: Convert to fraction form
    122,308.31/168,803.91 = 74,589.33/x
  3. Step 3: Cross multiply
    122,308.31x = 168,803.91 × 74,589.33
  4. Step 4: Simplify right side
    122,308.31x = 12,590,970,548.28
  5. Step 5: Solve for x
    x = 12,590,970,548.28/122,308.31
  6. Step 6: Final answer
    x = 102,944.53

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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.