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Finding the Fourth Proportional to 209,391.31, 314,268.30 and 109,621.29

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Solution

The fourth proportional to 209,391.31, 314,268.30 and 109,621.29 is: 164,526.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,391.31 : 314,268.30 = 109,621.29 : x
  2. Step 2: Convert to fraction form
    209,391.31/314,268.30 = 109,621.29/x
  3. Step 3: Cross multiply
    209,391.31x = 314,268.30 × 109,621.29
  4. Step 4: Simplify right side
    209,391.31x = 34,450,496,452.11
  5. Step 5: Solve for x
    x = 34,450,496,452.11/209,391.31
  6. Step 6: Final answer
    x = 164,526.87

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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.