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Finding the Fourth Proportional to 209,910.18, 314,792.36 and 69,636

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Solution

The fourth proportional to 209,910.18, 314,792.36 and 69,636 is: 104,429.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,910.18 : 314,792.36 = 69,636 : x
  2. Step 2: Convert to fraction form
    209,910.18/314,792.36 = 69,636/x
  3. Step 3: Cross multiply
    209,910.18x = 314,792.36 × 69,636
  4. Step 4: Simplify right side
    209,910.18x = 21,920,880,780.96
  5. Step 5: Solve for x
    x = 21,920,880,780.96/209,910.18
  6. Step 6: Final answer
    x = 104,429.81

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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.