Home / 138,002.12-206,950.65-90,604.54

Finding the Fourth Proportional to 138,002.12, 206,950.65 and 90,604.54

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Solution

The fourth proportional to 138,002.12, 206,950.65 and 90,604.54 is: 135,872.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,002.12 : 206,950.65 = 90,604.54 : x
  2. Step 2: Convert to fraction form
    138,002.12/206,950.65 = 90,604.54/x
  3. Step 3: Cross multiply
    138,002.12x = 206,950.65 × 90,604.54
  4. Step 4: Simplify right side
    138,002.12x = 18,750,666,958.18
  5. Step 5: Solve for x
    x = 18,750,666,958.18/138,002.12
  6. Step 6: Final answer
    x = 135,872.31

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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.