Home / 128,150.90-192,229.39-39,405.21

Finding the Fourth Proportional to 128,150.90, 192,229.39 and 39,405.21

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Solution

The fourth proportional to 128,150.90, 192,229.39 and 39,405.21 is: 59,108.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,150.90 : 192,229.39 = 39,405.21 : x
  2. Step 2: Convert to fraction form
    128,150.90/192,229.39 = 39,405.21/x
  3. Step 3: Cross multiply
    128,150.90x = 192,229.39 × 39,405.21
  4. Step 4: Simplify right side
    128,150.90x = 7,574,839,481.12
  5. Step 5: Solve for x
    x = 7,574,839,481.12/128,150.90
  6. Step 6: Final answer
    x = 59,108.75

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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.