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Finding the Fourth Proportional to 50,982.80, 70,358.42 and 28,321.68

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Solution

The fourth proportional to 50,982.80, 70,358.42 and 28,321.68 is: 39,085.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,982.80 : 70,358.42 = 28,321.68 : x
  2. Step 2: Convert to fraction form
    50,982.80/70,358.42 = 28,321.68/x
  3. Step 3: Cross multiply
    50,982.80x = 70,358.42 × 28,321.68
  4. Step 4: Simplify right side
    50,982.80x = 1,992,668,514.94
  5. Step 5: Solve for x
    x = 1,992,668,514.94/50,982.80
  6. Step 6: Final answer
    x = 39,085.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.