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Finding the Fourth Proportional to 136,702.62, 188,649 and 76,269.67

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Solution

The fourth proportional to 136,702.62, 188,649 and 76,269.67 is: 105,251.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,702.62 : 188,649 = 76,269.67 : x
  2. Step 2: Convert to fraction form
    136,702.62/188,649 = 76,269.67/x
  3. Step 3: Cross multiply
    136,702.62x = 188,649 × 76,269.67
  4. Step 4: Simplify right side
    136,702.62x = 14,388,196,504.21
  5. Step 5: Solve for x
    x = 14,388,196,504.21/136,702.62
  6. Step 6: Final answer
    x = 105,251.80

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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.