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Finding the Fourth Proportional to 126,431.72, 174,480.78 and 72,716.67

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Solution

The fourth proportional to 126,431.72, 174,480.78 and 72,716.67 is: 100,351.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,431.72 : 174,480.78 = 72,716.67 : x
  2. Step 2: Convert to fraction form
    126,431.72/174,480.78 = 72,716.67/x
  3. Step 3: Cross multiply
    126,431.72x = 174,480.78 × 72,716.67
  4. Step 4: Simplify right side
    126,431.72x = 12,687,661,573.29
  5. Step 5: Solve for x
    x = 12,687,661,573.29/126,431.72
  6. Step 6: Final answer
    x = 100,351.89

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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.