Home / 77,812.94-107,815.52-76,131.38

Finding the Fourth Proportional to 77,812.94, 107,815.52 and 76,131.38

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Solution

The fourth proportional to 77,812.94, 107,815.52 and 76,131.38 is: 105,485.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,812.94 : 107,815.52 = 76,131.38 : x
  2. Step 2: Convert to fraction form
    77,812.94/107,815.52 = 76,131.38/x
  3. Step 3: Cross multiply
    77,812.94x = 107,815.52 × 76,131.38
  4. Step 4: Simplify right side
    77,812.94x = 8,208,143,403.28
  5. Step 5: Solve for x
    x = 8,208,143,403.28/77,812.94
  6. Step 6: Final answer
    x = 105,485.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.