Home / 127,020.91-190,540.68-42,780.64

Finding the Fourth Proportional to 127,020.91, 190,540.68 and 42,780.64

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Solution

The fourth proportional to 127,020.91, 190,540.68 and 42,780.64 is: 64,174.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,020.91 : 190,540.68 = 42,780.64 : x
  2. Step 2: Convert to fraction form
    127,020.91/190,540.68 = 42,780.64/x
  3. Step 3: Cross multiply
    127,020.91x = 190,540.68 × 42,780.64
  4. Step 4: Simplify right side
    127,020.91x = 8,151,452,236.44
  5. Step 5: Solve for x
    x = 8,151,452,236.44/127,020.91
  6. Step 6: Final answer
    x = 64,174.10

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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.