Home / 128,322.40-177,085.37-71,733.78

Finding the Fourth Proportional to 128,322.40, 177,085.37 and 71,733.78

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Solution

The fourth proportional to 128,322.40, 177,085.37 and 71,733.78 is: 98,992.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,322.40 : 177,085.37 = 71,733.78 : x
  2. Step 2: Convert to fraction form
    128,322.40/177,085.37 = 71,733.78/x
  3. Step 3: Cross multiply
    128,322.40x = 177,085.37 × 71,733.78
  4. Step 4: Simplify right side
    128,322.40x = 12,703,002,972.80
  5. Step 5: Solve for x
    x = 12,703,002,972.80/128,322.40
  6. Step 6: Final answer
    x = 98,992.87

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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.