Home / 128,329.75-192,430.37-39,571.72

Finding the Fourth Proportional to 128,329.75, 192,430.37 and 39,571.72

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Solution

The fourth proportional to 128,329.75, 192,430.37 and 39,571.72 is: 59,337.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,329.75 : 192,430.37 = 39,571.72 : x
  2. Step 2: Convert to fraction form
    128,329.75/192,430.37 = 39,571.72/x
  3. Step 3: Cross multiply
    128,329.75x = 192,430.37 × 39,571.72
  4. Step 4: Simplify right side
    128,329.75x = 7,614,799,561.13
  5. Step 5: Solve for x
    x = 7,614,799,561.13/128,329.75
  6. Step 6: Final answer
    x = 59,337.76

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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.