Home / 109,707.80-164,561.70-91,993.10

Finding the Fourth Proportional to 109,707.80, 164,561.70 and 91,993.10

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Solution

The fourth proportional to 109,707.80, 164,561.70 and 91,993.10 is: 137,989.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,707.80 : 164,561.70 = 91,993.10 : x
  2. Step 2: Convert to fraction form
    109,707.80/164,561.70 = 91,993.10/x
  3. Step 3: Cross multiply
    109,707.80x = 164,561.70 × 91,993.10
  4. Step 4: Simplify right side
    109,707.80x = 15,138,540,924.27
  5. Step 5: Solve for x
    x = 15,138,540,924.27/109,707.80
  6. Step 6: Final answer
    x = 137,989.65

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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.