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Finding the Fourth Proportional to 91,604.80, 137,212.80 and 76,052.80

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Solution

The fourth proportional to 91,604.80, 137,212.80 and 76,052.80 is: 113,917.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,604.80 : 137,212.80 = 76,052.80 : x
  2. Step 2: Convert to fraction form
    91,604.80/137,212.80 = 76,052.80/x
  3. Step 3: Cross multiply
    91,604.80x = 137,212.80 × 76,052.80
  4. Step 4: Simplify right side
    91,604.80x = 10,435,417,635.84
  5. Step 5: Solve for x
    x = 10,435,417,635.84/91,604.80
  6. Step 6: Final answer
    x = 113,917.80

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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.