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Finding the Fourth Proportional to 235,920, 325,569.60 and 129,936

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Solution

The fourth proportional to 235,920, 325,569.60 and 129,936 is: 179,311.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,920 : 325,569.60 = 129,936 : x
  2. Step 2: Convert to fraction form
    235,920/325,569.60 = 129,936/x
  3. Step 3: Cross multiply
    235,920x = 325,569.60 × 129,936
  4. Step 4: Simplify right side
    235,920x = 42,303,211,545.60
  5. Step 5: Solve for x
    x = 42,303,211,545.60/235,920
  6. Step 6: Final answer
    x = 179,311.68

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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.