Home / 205,987.40-309,498.72-131,140.96

Finding the Fourth Proportional to 205,987.40, 309,498.72 and 131,140.96

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Solution

The fourth proportional to 205,987.40, 309,498.72 and 131,140.96 is: 197,040.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,987.40 : 309,498.72 = 131,140.96 : x
  2. Step 2: Convert to fraction form
    205,987.40/309,498.72 = 131,140.96/x
  3. Step 3: Cross multiply
    205,987.40x = 309,498.72 × 131,140.96
  4. Step 4: Simplify right side
    205,987.40x = 40,587,959,259.57
  5. Step 5: Solve for x
    x = 40,587,959,259.57/205,987.40
  6. Step 6: Final answer
    x = 197,040.98

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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.