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Finding the Fourth Proportional to 118,391.18, 163,379.28 and 67,406

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Solution

The fourth proportional to 118,391.18, 163,379.28 and 67,406 is: 93,019.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,391.18 : 163,379.28 = 67,406 : x
  2. Step 2: Convert to fraction form
    118,391.18/163,379.28 = 67,406/x
  3. Step 3: Cross multiply
    118,391.18x = 163,379.28 × 67,406
  4. Step 4: Simplify right side
    118,391.18x = 11,012,743,747.68
  5. Step 5: Solve for x
    x = 11,012,743,747.68/118,391.18
  6. Step 6: Final answer
    x = 93,019.97

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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.