Home / 135,006.75-186,301.59-80,620.29

Finding the Fourth Proportional to 135,006.75, 186,301.59 and 80,620.29

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Solution

The fourth proportional to 135,006.75, 186,301.59 and 80,620.29 is: 111,251.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,006.75 : 186,301.59 = 80,620.29 : x
  2. Step 2: Convert to fraction form
    135,006.75/186,301.59 = 80,620.29/x
  3. Step 3: Cross multiply
    135,006.75x = 186,301.59 × 80,620.29
  4. Step 4: Simplify right side
    135,006.75x = 15,019,688,213.26
  5. Step 5: Solve for x
    x = 15,019,688,213.26/135,006.75
  6. Step 6: Final answer
    x = 111,251.39

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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.