Home / 128,020.20-191,684.70-100,372.20

Finding the Fourth Proportional to 128,020.20, 191,684.70 and 100,372.20

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Solution

The fourth proportional to 128,020.20, 191,684.70 and 100,372.20 is: 150,287.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,020.20 : 191,684.70 = 100,372.20 : x
  2. Step 2: Convert to fraction form
    128,020.20/191,684.70 = 100,372.20/x
  3. Step 3: Cross multiply
    128,020.20x = 191,684.70 × 100,372.20
  4. Step 4: Simplify right side
    128,020.20x = 19,239,815,045.34
  5. Step 5: Solve for x
    x = 19,239,815,045.34/128,020.20
  6. Step 6: Final answer
    x = 150,287.34

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1.5x scale

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.