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Finding the Fourth Proportional to 81,769.80, 112,840.98 and 45,469.80

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Solution

The fourth proportional to 81,769.80, 112,840.98 and 45,469.80 is: 62,747.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,769.80 : 112,840.98 = 45,469.80 : x
  2. Step 2: Convert to fraction form
    81,769.80/112,840.98 = 45,469.80/x
  3. Step 3: Cross multiply
    81,769.80x = 112,840.98 × 45,469.80
  4. Step 4: Simplify right side
    81,769.80x = 5,130,856,792.40
  5. Step 5: Solve for x
    x = 5,130,856,792.40/81,769.80
  6. Step 6: Final answer
    x = 62,747.58

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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.