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Finding the Fourth Proportional to 163,418.85, 225,493.45 and 91,785.15

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Solution

The fourth proportional to 163,418.85, 225,493.45 and 91,785.15 is: 126,649.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,418.85 : 225,493.45 = 91,785.15 : x
  2. Step 2: Convert to fraction form
    163,418.85/225,493.45 = 91,785.15/x
  3. Step 3: Cross multiply
    163,418.85x = 225,493.45 × 91,785.15
  4. Step 4: Simplify right side
    163,418.85x = 20,696,950,132.27
  5. Step 5: Solve for x
    x = 20,696,950,132.27/163,418.85
  6. Step 6: Final answer
    x = 126,649.71

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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.