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Finding the Fourth Proportional to 213,062.80, 319,205.40 and 129,859.60

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Solution

The fourth proportional to 213,062.80, 319,205.40 and 129,859.60 is: 194,552.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,062.80 : 319,205.40 = 129,859.60 : x
  2. Step 2: Convert to fraction form
    213,062.80/319,205.40 = 129,859.60/x
  3. Step 3: Cross multiply
    213,062.80x = 319,205.40 × 129,859.60
  4. Step 4: Simplify right side
    213,062.80x = 41,451,885,561.84
  5. Step 5: Solve for x
    x = 41,451,885,561.84/213,062.80
  6. Step 6: Final answer
    x = 194,552.43

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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.