Home / 128,289.30-192,440.42-39,603.48

Finding the Fourth Proportional to 128,289.30, 192,440.42 and 39,603.48

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Solution

The fourth proportional to 128,289.30, 192,440.42 and 39,603.48 is: 59,407.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,289.30 : 192,440.42 = 39,603.48 : x
  2. Step 2: Convert to fraction form
    128,289.30/192,440.42 = 39,603.48/x
  3. Step 3: Cross multiply
    128,289.30x = 192,440.42 × 39,603.48
  4. Step 4: Simplify right side
    128,289.30x = 7,621,310,324.66
  5. Step 5: Solve for x
    x = 7,621,310,324.66/128,289.30
  6. Step 6: Final answer
    x = 59,407.22

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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.