Home / 130,790.97-180,147.78-100,518.37

Finding the Fourth Proportional to 130,790.97, 180,147.78 and 100,518.37

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Solution

The fourth proportional to 130,790.97, 180,147.78 and 100,518.37 is: 138,451.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,790.97 : 180,147.78 = 100,518.37 : x
  2. Step 2: Convert to fraction form
    130,790.97/180,147.78 = 100,518.37/x
  3. Step 3: Cross multiply
    130,790.97x = 180,147.78 × 100,518.37
  4. Step 4: Simplify right side
    130,790.97x = 18,108,160,754.35
  5. Step 5: Solve for x
    x = 18,108,160,754.35/130,790.97
  6. Step 6: Final answer
    x = 138,451.15

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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.