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Finding the Fourth Proportional to 91,536, 126,321.60 and 51,792

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Solution

The fourth proportional to 91,536, 126,321.60 and 51,792 is: 71,474.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,536 : 126,321.60 = 51,792 : x
  2. Step 2: Convert to fraction form
    91,536/126,321.60 = 51,792/x
  3. Step 3: Cross multiply
    91,536x = 126,321.60 × 51,792
  4. Step 4: Simplify right side
    91,536x = 6,542,448,307.20
  5. Step 5: Solve for x
    x = 6,542,448,307.20/91,536
  6. Step 6: Final answer
    x = 71,474.05

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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.