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Finding the Fourth Proportional to 138,673.67, 208,026.91 and 45,179.42

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Solution

The fourth proportional to 138,673.67, 208,026.91 and 45,179.42 is: 67,774.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,673.67 : 208,026.91 = 45,179.42 : x
  2. Step 2: Convert to fraction form
    138,673.67/208,026.91 = 45,179.42/x
  3. Step 3: Cross multiply
    138,673.67x = 208,026.91 × 45,179.42
  4. Step 4: Simplify right side
    138,673.67x = 9,398,535,138.19
  5. Step 5: Solve for x
    x = 9,398,535,138.19/138,673.67
  6. Step 6: Final answer
    x = 67,774.47

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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.