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Finding the Fourth Proportional to 236,642.70, 326,580.15 and 129,222.70

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Solution

The fourth proportional to 236,642.70, 326,580.15 and 129,222.70 is: 178,334.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,642.70 : 326,580.15 = 129,222.70 : x
  2. Step 2: Convert to fraction form
    236,642.70/326,580.15 = 129,222.70/x
  3. Step 3: Cross multiply
    236,642.70x = 326,580.15 × 129,222.70
  4. Step 4: Simplify right side
    236,642.70x = 42,201,568,749.41
  5. Step 5: Solve for x
    x = 42,201,568,749.41/236,642.70
  6. Step 6: Final answer
    x = 178,334.55

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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.