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Finding the Fourth Proportional to 209,912.60, 314,918.10 and 69,671.22

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Solution

The fourth proportional to 209,912.60, 314,918.10 and 69,671.22 is: 104,523.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,912.60 : 314,918.10 = 69,671.22 : x
  2. Step 2: Convert to fraction form
    209,912.60/314,918.10 = 69,671.22/x
  3. Step 3: Cross multiply
    209,912.60x = 314,918.10 × 69,671.22
  4. Step 4: Simplify right side
    209,912.60x = 21,940,728,227.08
  5. Step 5: Solve for x
    x = 21,940,728,227.08/209,912.60
  6. Step 6: Final answer
    x = 104,523.16

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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.