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Finding the Fourth Proportional to 91,957.66, 126,912.91 and 51,670.55

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Solution

The fourth proportional to 91,957.66, 126,912.91 and 51,670.55 is: 71,311.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,957.66 : 126,912.91 = 51,670.55 : x
  2. Step 2: Convert to fraction form
    91,957.66/126,912.91 = 51,670.55/x
  3. Step 3: Cross multiply
    91,957.66x = 126,912.91 × 51,670.55
  4. Step 4: Simplify right side
    91,957.66x = 6,557,659,432.90
  5. Step 5: Solve for x
    x = 6,557,659,432.90/91,957.66
  6. Step 6: Final answer
    x = 71,311.72

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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.