Home / 127,938.20-191,561.70-100,290.20

Finding the Fourth Proportional to 127,938.20, 191,561.70 and 100,290.20

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Solution

The fourth proportional to 127,938.20, 191,561.70 and 100,290.20 is: 150,164.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,938.20 : 191,561.70 = 100,290.20 : x
  2. Step 2: Convert to fraction form
    127,938.20/191,561.70 = 100,290.20/x
  3. Step 3: Cross multiply
    127,938.20x = 191,561.70 × 100,290.20
  4. Step 4: Simplify right side
    127,938.20x = 19,211,761,205.34
  5. Step 5: Solve for x
    x = 19,211,761,205.34/127,938.20
  6. Step 6: Final answer
    x = 150,164.39

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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.