Home / 205,982.16-309,103.20-87,653.40

Finding the Fourth Proportional to 205,982.16, 309,103.20 and 87,653.40

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Solution

The fourth proportional to 205,982.16, 309,103.20 and 87,653.40 is: 131,535.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,982.16 : 309,103.20 = 87,653.40 : x
  2. Step 2: Convert to fraction form
    205,982.16/309,103.20 = 87,653.40/x
  3. Step 3: Cross multiply
    205,982.16x = 309,103.20 × 87,653.40
  4. Step 4: Simplify right side
    205,982.16x = 27,093,946,430.88
  5. Step 5: Solve for x
    x = 27,093,946,430.88/205,982.16
  6. Step 6: Final answer
    x = 131,535.40

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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.