Home / 79,135.09-109,216.82-45,135.78

Finding the Fourth Proportional to 79,135.09, 109,216.82 and 45,135.78

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Solution

The fourth proportional to 79,135.09, 109,216.82 and 45,135.78 is: 62,293.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,135.09 : 109,216.82 = 45,135.78 : x
  2. Step 2: Convert to fraction form
    79,135.09/109,216.82 = 45,135.78/x
  3. Step 3: Cross multiply
    79,135.09x = 109,216.82 × 45,135.78
  4. Step 4: Simplify right side
    79,135.09x = 4,929,586,359.82
  5. Step 5: Solve for x
    x = 4,929,586,359.82/79,135.09
  6. Step 6: Final answer
    x = 62,293.31

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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.