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Finding the Fourth Proportional to 213,049.69, 319,562 and 79,918.80

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Solution

The fourth proportional to 213,049.69, 319,562 and 79,918.80 is: 119,873.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,049.69 : 319,562 = 79,918.80 : x
  2. Step 2: Convert to fraction form
    213,049.69/319,562 = 79,918.80/x
  3. Step 3: Cross multiply
    213,049.69x = 319,562 × 79,918.80
  4. Step 4: Simplify right side
    213,049.69x = 25,539,009,967.79
  5. Step 5: Solve for x
    x = 25,539,009,967.79/213,049.69
  6. Step 6: Final answer
    x = 119,873.49

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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.