Home / 90,716.12-125,144.68-78,119

Finding the Fourth Proportional to 90,716.12, 125,144.68 and 78,119

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Solution

The fourth proportional to 90,716.12, 125,144.68 and 78,119 is: 107,766.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,716.12 : 125,144.68 = 78,119 : x
  2. Step 2: Convert to fraction form
    90,716.12/125,144.68 = 78,119/x
  3. Step 3: Cross multiply
    90,716.12x = 125,144.68 × 78,119
  4. Step 4: Simplify right side
    90,716.12x = 9,776,177,256.92
  5. Step 5: Solve for x
    x = 9,776,177,256.92/90,716.12
  6. Step 6: Final answer
    x = 107,766.70

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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.