Home / 128,717.39-177,433.19-90,369.46

Finding the Fourth Proportional to 128,717.39, 177,433.19 and 90,369.46

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Solution

The fourth proportional to 128,717.39, 177,433.19 and 90,369.46 is: 124,571.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,717.39 : 177,433.19 = 90,369.46 : x
  2. Step 2: Convert to fraction form
    128,717.39/177,433.19 = 90,369.46/x
  3. Step 3: Cross multiply
    128,717.39x = 177,433.19 × 90,369.46
  4. Step 4: Simplify right side
    128,717.39x = 16,034,541,566.38
  5. Step 5: Solve for x
    x = 16,034,541,566.38/128,717.39
  6. Step 6: Final answer
    x = 124,571.68

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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.