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Finding the Fourth Proportional to 347,805.30, 521,659.35 and 111,171.90

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Solution

The fourth proportional to 347,805.30, 521,659.35 and 111,171.90 is: 166,742.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,805.30 : 521,659.35 = 111,171.90 : x
  2. Step 2: Convert to fraction form
    347,805.30/521,659.35 = 111,171.90/x
  3. Step 3: Cross multiply
    347,805.30x = 521,659.35 × 111,171.90
  4. Step 4: Simplify right side
    347,805.30x = 57,993,861,092.27
  5. Step 5: Solve for x
    x = 57,993,861,092.27/347,805.30
  6. Step 6: Final answer
    x = 166,742.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.