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Finding the Fourth Proportional to 138,620.49, 191,296.28 and 74,958.29

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Solution

The fourth proportional to 138,620.49, 191,296.28 and 74,958.29 is: 103,442.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,620.49 : 191,296.28 = 74,958.29 : x
  2. Step 2: Convert to fraction form
    138,620.49/191,296.28 = 74,958.29/x
  3. Step 3: Cross multiply
    138,620.49x = 191,296.28 × 74,958.29
  4. Step 4: Simplify right side
    138,620.49x = 14,339,241,442.42
  5. Step 5: Solve for x
    x = 14,339,241,442.42/138,620.49
  6. Step 6: Final answer
    x = 103,442.44

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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.