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Finding the Fourth Proportional to 209,636.28, 314,503.56 and 69,394.86

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Solution

The fourth proportional to 209,636.28, 314,503.56 and 69,394.86 is: 104,108.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,636.28 : 314,503.56 = 69,394.86 : x
  2. Step 2: Convert to fraction form
    209,636.28/314,503.56 = 69,394.86/x
  3. Step 3: Cross multiply
    209,636.28x = 314,503.56 × 69,394.86
  4. Step 4: Simplify right side
    209,636.28x = 21,824,930,515.70
  5. Step 5: Solve for x
    x = 21,824,930,515.70/209,636.28
  6. Step 6: Final answer
    x = 104,108.56

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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.