Home / 137,400.30-206,103.15-90,315.54

Finding the Fourth Proportional to 137,400.30, 206,103.15 and 90,315.54

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Solution

The fourth proportional to 137,400.30, 206,103.15 and 90,315.54 is: 135,475.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,400.30 : 206,103.15 = 90,315.54 : x
  2. Step 2: Convert to fraction form
    137,400.30/206,103.15 = 90,315.54/x
  3. Step 3: Cross multiply
    137,400.30x = 206,103.15 × 90,315.54
  4. Step 4: Simplify right side
    137,400.30x = 18,614,317,287.95
  5. Step 5: Solve for x
    x = 18,614,317,287.95/137,400.30
  6. Step 6: Final answer
    x = 135,475.08

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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.