Home / 77,086.20-115,542.90-39,631.80

Finding the Fourth Proportional to 77,086.20, 115,542.90 and 39,631.80

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Solution

The fourth proportional to 77,086.20, 115,542.90 and 39,631.80 is: 59,403.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,086.20 : 115,542.90 = 39,631.80 : x
  2. Step 2: Convert to fraction form
    77,086.20/115,542.90 = 39,631.80/x
  3. Step 3: Cross multiply
    77,086.20x = 115,542.90 × 39,631.80
  4. Step 4: Simplify right side
    77,086.20x = 4,579,173,104.22
  5. Step 5: Solve for x
    x = 4,579,173,104.22/77,086.20
  6. Step 6: Final answer
    x = 59,403.28

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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.