Home / 128,326.86-177,091.29-71,738.19

Finding the Fourth Proportional to 128,326.86, 177,091.29 and 71,738.19

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Solution

The fourth proportional to 128,326.86, 177,091.29 and 71,738.19 is: 98,998.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,326.86 : 177,091.29 = 71,738.19 : x
  2. Step 2: Convert to fraction form
    128,326.86/177,091.29 = 71,738.19/x
  3. Step 3: Cross multiply
    128,326.86x = 177,091.29 × 71,738.19
  4. Step 4: Simplify right side
    128,326.86x = 12,704,208,609.37
  5. Step 5: Solve for x
    x = 12,704,208,609.37/128,326.86
  6. Step 6: Final answer
    x = 98,998.83

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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.