Home / 259,968.30-389,952.45-72,979.80

Finding the Fourth Proportional to 259,968.30, 389,952.45 and 72,979.80

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Solution

The fourth proportional to 259,968.30, 389,952.45 and 72,979.80 is: 109,469.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,968.30 : 389,952.45 = 72,979.80 : x
  2. Step 2: Convert to fraction form
    259,968.30/389,952.45 = 72,979.80/x
  3. Step 3: Cross multiply
    259,968.30x = 389,952.45 × 72,979.80
  4. Step 4: Simplify right side
    259,968.30x = 28,458,651,810.51
  5. Step 5: Solve for x
    x = 28,458,651,810.51/259,968.30
  6. Step 6: Final answer
    x = 109,469.70

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Similar ratio
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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.