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Finding the Fourth Proportional to 84,313.98, 126,514.71 and 61,131.78

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Solution

The fourth proportional to 84,313.98, 126,514.71 and 61,131.78 is: 91,729.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,313.98 : 126,514.71 = 61,131.78 : x
  2. Step 2: Convert to fraction form
    84,313.98/126,514.71 = 61,131.78/x
  3. Step 3: Cross multiply
    84,313.98x = 126,514.71 × 61,131.78
  4. Step 4: Simplify right side
    84,313.98x = 7,734,069,418.48
  5. Step 5: Solve for x
    x = 7,734,069,418.48/84,313.98
  6. Step 6: Final answer
    x = 91,729.38

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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.