Home / 205,722.10-309,101.55-130,878.10

Finding the Fourth Proportional to 205,722.10, 309,101.55 and 130,878.10

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Solution

The fourth proportional to 205,722.10, 309,101.55 and 130,878.10 is: 196,646.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,722.10 : 309,101.55 = 130,878.10 : x
  2. Step 2: Convert to fraction form
    205,722.10/309,101.55 = 130,878.10/x
  3. Step 3: Cross multiply
    205,722.10x = 309,101.55 × 130,878.10
  4. Step 4: Simplify right side
    205,722.10x = 40,454,623,571.06
  5. Step 5: Solve for x
    x = 40,454,623,571.06/205,722.10
  6. Step 6: Final answer
    x = 196,646.95

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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.