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Finding the Fourth Proportional to 71,157.74, 98,171.73 and 54,809.91

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Solution

The fourth proportional to 71,157.74, 98,171.73 and 54,809.91 is: 75,617.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,157.74 : 98,171.73 = 54,809.91 : x
  2. Step 2: Convert to fraction form
    71,157.74/98,171.73 = 54,809.91/x
  3. Step 3: Cross multiply
    71,157.74x = 98,171.73 × 54,809.91
  4. Step 4: Simplify right side
    71,157.74x = 5,380,783,685.84
  5. Step 5: Solve for x
    x = 5,380,783,685.84/71,157.74
  6. Step 6: Final answer
    x = 75,617.69

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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.