Home / 128,703.07-177,504.94-90,588.79

Finding the Fourth Proportional to 128,703.07, 177,504.94 and 90,588.79

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Solution

The fourth proportional to 128,703.07, 177,504.94 and 90,588.79 is: 124,938.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,703.07 : 177,504.94 = 90,588.79 : x
  2. Step 2: Convert to fraction form
    128,703.07/177,504.94 = 90,588.79/x
  3. Step 3: Cross multiply
    128,703.07x = 177,504.94 × 90,588.79
  4. Step 4: Simplify right side
    128,703.07x = 16,079,957,824.29
  5. Step 5: Solve for x
    x = 16,079,957,824.29/128,703.07
  6. Step 6: Final answer
    x = 124,938.42

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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.