Home / 126,063.10-188,845.05-81,720.70

Finding the Fourth Proportional to 126,063.10, 188,845.05 and 81,720.70

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Solution

The fourth proportional to 126,063.10, 188,845.05 and 81,720.70 is: 122,419.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,063.10 : 188,845.05 = 81,720.70 : x
  2. Step 2: Convert to fraction form
    126,063.10/188,845.05 = 81,720.70/x
  3. Step 3: Cross multiply
    126,063.10x = 188,845.05 × 81,720.70
  4. Step 4: Simplify right side
    126,063.10x = 15,432,549,677.54
  5. Step 5: Solve for x
    x = 15,432,549,677.54/126,063.10
  6. Step 6: Final answer
    x = 122,419.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.