Home / 109,405.10-164,107.65-91,909.10

Finding the Fourth Proportional to 109,405.10, 164,107.65 and 91,909.10

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Solution

The fourth proportional to 109,405.10, 164,107.65 and 91,909.10 is: 137,863.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,405.10 : 164,107.65 = 91,909.10 : x
  2. Step 2: Convert to fraction form
    109,405.10/164,107.65 = 91,909.10/x
  3. Step 3: Cross multiply
    109,405.10x = 164,107.65 × 91,909.10
  4. Step 4: Simplify right side
    109,405.10x = 15,082,986,414.62
  5. Step 5: Solve for x
    x = 15,082,986,414.62/109,405.10
  6. Step 6: Final answer
    x = 137,863.65

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1.5x scale

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.