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Finding the Fourth Proportional to 92,912.46, 128,219.86 and 50,470.98

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Solution

The fourth proportional to 92,912.46, 128,219.86 and 50,470.98 is: 69,650.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,912.46 : 128,219.86 = 50,470.98 : x
  2. Step 2: Convert to fraction form
    92,912.46/128,219.86 = 50,470.98/x
  3. Step 3: Cross multiply
    92,912.46x = 128,219.86 × 50,470.98
  4. Step 4: Simplify right side
    92,912.46x = 6,471,381,989.66
  5. Step 5: Solve for x
    x = 6,471,381,989.66/92,912.46
  6. Step 6: Final answer
    x = 69,650.31

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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.