Home / 100,229.58-138,313.22-57,211.29

Finding the Fourth Proportional to 100,229.58, 138,313.22 and 57,211.29

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Solution

The fourth proportional to 100,229.58, 138,313.22 and 57,211.29 is: 78,949.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,229.58 : 138,313.22 = 57,211.29 : x
  2. Step 2: Convert to fraction form
    100,229.58/138,313.22 = 57,211.29/x
  3. Step 3: Cross multiply
    100,229.58x = 138,313.22 × 57,211.29
  4. Step 4: Simplify right side
    100,229.58x = 7,913,077,454.20
  5. Step 5: Solve for x
    x = 7,913,077,454.20/100,229.58
  6. Step 6: Final answer
    x = 78,949.52

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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.