Home / 128,451.22-177,322.20-74,716.66

Finding the Fourth Proportional to 128,451.22, 177,322.20 and 74,716.66

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Solution

The fourth proportional to 128,451.22, 177,322.20 and 74,716.66 is: 103,143.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,451.22 : 177,322.20 = 74,716.66 : x
  2. Step 2: Convert to fraction form
    128,451.22/177,322.20 = 74,716.66/x
  3. Step 3: Cross multiply
    128,451.22x = 177,322.20 × 74,716.66
  4. Step 4: Simplify right side
    128,451.22x = 13,248,922,527.85
  5. Step 5: Solve for x
    x = 13,248,922,527.85/128,451.22
  6. Step 6: Final answer
    x = 103,143.61

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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.