Home / 185,128.13-255,478.05-100,245.20

Finding the Fourth Proportional to 185,128.13, 255,478.05 and 100,245.20

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Solution

The fourth proportional to 185,128.13, 255,478.05 and 100,245.20 is: 138,339.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,128.13 : 255,478.05 = 100,245.20 : x
  2. Step 2: Convert to fraction form
    185,128.13/255,478.05 = 100,245.20/x
  3. Step 3: Cross multiply
    185,128.13x = 255,478.05 × 100,245.20
  4. Step 4: Simplify right side
    185,128.13x = 25,610,446,940.47
  5. Step 5: Solve for x
    x = 25,610,446,940.47/185,128.13
  6. Step 6: Final answer
    x = 138,339.03

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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.