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Finding the Fourth Proportional to 83,940.75, 125,911.13 and 28,536.75

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Solution

The fourth proportional to 83,940.75, 125,911.13 and 28,536.75 is: 42,805.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,940.75 : 125,911.13 = 28,536.75 : x
  2. Step 2: Convert to fraction form
    83,940.75/125,911.13 = 28,536.75/x
  3. Step 3: Cross multiply
    83,940.75x = 125,911.13 × 28,536.75
  4. Step 4: Simplify right side
    83,940.75x = 3,593,094,296.34
  5. Step 5: Solve for x
    x = 3,593,094,296.34/83,940.75
  6. Step 6: Final answer
    x = 42,805.13

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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.