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Finding the Fourth Proportional to 209,969.28, 314,949.60 and 69,729.12

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Solution

The fourth proportional to 209,969.28, 314,949.60 and 69,729.12 is: 104,592.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,969.28 : 314,949.60 = 69,729.12 : x
  2. Step 2: Convert to fraction form
    209,969.28/314,949.60 = 69,729.12/x
  3. Step 3: Cross multiply
    209,969.28x = 314,949.60 × 69,729.12
  4. Step 4: Simplify right side
    209,969.28x = 21,961,158,452.35
  5. Step 5: Solve for x
    x = 21,961,158,452.35/209,969.28
  6. Step 6: Final answer
    x = 104,592.25

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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.