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Finding the Fourth Proportional to 53,279.54, 79,843.08 and 39,128.54

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Solution

The fourth proportional to 53,279.54, 79,843.08 and 39,128.54 is: 58,636.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,279.54 : 79,843.08 = 39,128.54 : x
  2. Step 2: Convert to fraction form
    53,279.54/79,843.08 = 39,128.54/x
  3. Step 3: Cross multiply
    53,279.54x = 79,843.08 × 39,128.54
  4. Step 4: Simplify right side
    53,279.54x = 3,124,143,149.50
  5. Step 5: Solve for x
    x = 3,124,143,149.50/53,279.54
  6. Step 6: Final answer
    x = 58,636.83

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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.