Home / 109,696.30-164,544.45-91,981.60

Finding the Fourth Proportional to 109,696.30, 164,544.45 and 91,981.60

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Solution

The fourth proportional to 109,696.30, 164,544.45 and 91,981.60 is: 137,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,696.30 : 164,544.45 = 91,981.60 : x
  2. Step 2: Convert to fraction form
    109,696.30/164,544.45 = 91,981.60/x
  3. Step 3: Cross multiply
    109,696.30x = 164,544.45 × 91,981.60
  4. Step 4: Simplify right side
    109,696.30x = 15,135,061,782.12
  5. Step 5: Solve for x
    x = 15,135,061,782.12/109,696.30
  6. Step 6: Final answer
    x = 137,972.40

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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.