Home / 100,246.29-138,305.79-57,194.85

Finding the Fourth Proportional to 100,246.29, 138,305.79 and 57,194.85

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Solution

The fourth proportional to 100,246.29, 138,305.79 and 57,194.85 is: 78,909.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,246.29 : 138,305.79 = 57,194.85 : x
  2. Step 2: Convert to fraction form
    100,246.29/138,305.79 = 57,194.85/x
  3. Step 3: Cross multiply
    100,246.29x = 138,305.79 × 57,194.85
  4. Step 4: Simplify right side
    100,246.29x = 7,910,378,913.18
  5. Step 5: Solve for x
    x = 7,910,378,913.18/100,246.29
  6. Step 6: Final answer
    x = 78,909.44

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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.