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Finding the Fourth Proportional to 205,329.80, 308,037.90 and 86,940.20

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Solution

The fourth proportional to 205,329.80, 308,037.90 and 86,940.20 is: 130,428.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,329.80 : 308,037.90 = 86,940.20 : x
  2. Step 2: Convert to fraction form
    205,329.80/308,037.90 = 86,940.20/x
  3. Step 3: Cross multiply
    205,329.80x = 308,037.90 × 86,940.20
  4. Step 4: Simplify right side
    205,329.80x = 26,780,876,633.58
  5. Step 5: Solve for x
    x = 26,780,876,633.58/205,329.80
  6. Step 6: Final answer
    x = 130,428.59

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1.5x scale

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.