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Finding the Fourth Proportional to 91,212.57, 125,583.02 and 80,448.43

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Solution

The fourth proportional to 91,212.57, 125,583.02 and 80,448.43 is: 110,762.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,212.57 : 125,583.02 = 80,448.43 : x
  2. Step 2: Convert to fraction form
    91,212.57/125,583.02 = 80,448.43/x
  3. Step 3: Cross multiply
    91,212.57x = 125,583.02 × 80,448.43
  4. Step 4: Simplify right side
    91,212.57x = 10,102,956,793.66
  5. Step 5: Solve for x
    x = 10,102,956,793.66/91,212.57
  6. Step 6: Final answer
    x = 110,762.77

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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.