Home / 135,470.75-186,931.94-78,112.22

Finding the Fourth Proportional to 135,470.75, 186,931.94 and 78,112.22

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Solution

The fourth proportional to 135,470.75, 186,931.94 and 78,112.22 is: 107,784.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,470.75 : 186,931.94 = 78,112.22 : x
  2. Step 2: Convert to fraction form
    135,470.75/186,931.94 = 78,112.22/x
  3. Step 3: Cross multiply
    135,470.75x = 186,931.94 × 78,112.22
  4. Step 4: Simplify right side
    135,470.75x = 14,601,667,497.09
  5. Step 5: Solve for x
    x = 14,601,667,497.09/135,470.75
  6. Step 6: Final answer
    x = 107,784.65

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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.