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Finding the Fourth Proportional to 90,630.81, 125,072.79 and 50,342.64

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Solution

The fourth proportional to 90,630.81, 125,072.79 and 50,342.64 is: 69,474.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,630.81 : 125,072.79 = 50,342.64 : x
  2. Step 2: Convert to fraction form
    90,630.81/125,072.79 = 50,342.64/x
  3. Step 3: Cross multiply
    90,630.81x = 125,072.79 × 50,342.64
  4. Step 4: Simplify right side
    90,630.81x = 6,296,494,440.77
  5. Step 5: Solve for x
    x = 6,296,494,440.77/90,630.81
  6. Step 6: Final answer
    x = 69,474.11

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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.