Home / 106,021.31-159,007.35-31,121.34

Finding the Fourth Proportional to 106,021.31, 159,007.35 and 31,121.34

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Solution

The fourth proportional to 106,021.31, 159,007.35 and 31,121.34 is: 46,674.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    106,021.31 : 159,007.35 = 31,121.34 : x
  2. Step 2: Convert to fraction form
    106,021.31/159,007.35 = 31,121.34/x
  3. Step 3: Cross multiply
    106,021.31x = 159,007.35 × 31,121.34
  4. Step 4: Simplify right side
    106,021.31x = 4,948,521,801.85
  5. Step 5: Solve for x
    x = 4,948,521,801.85/106,021.31
  6. Step 6: Final answer
    x = 46,674.78

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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.