Home / 149,942.13-206,916.30-81,959.28

Finding the Fourth Proportional to 149,942.13, 206,916.30 and 81,959.28

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Solution

The fourth proportional to 149,942.13, 206,916.30 and 81,959.28 is: 113,101.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,942.13 : 206,916.30 = 81,959.28 : x
  2. Step 2: Convert to fraction form
    149,942.13/206,916.30 = 81,959.28/x
  3. Step 3: Cross multiply
    149,942.13x = 206,916.30 × 81,959.28
  4. Step 4: Simplify right side
    149,942.13x = 16,958,710,968.26
  5. Step 5: Solve for x
    x = 16,958,710,968.26/149,942.13
  6. Step 6: Final answer
    x = 113,101.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.