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Finding the Fourth Proportional to 61,795.40, 85,309.26 and 39,157.88

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Solution

The fourth proportional to 61,795.40, 85,309.26 and 39,157.88 is: 54,057.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,795.40 : 85,309.26 = 39,157.88 : x
  2. Step 2: Convert to fraction form
    61,795.40/85,309.26 = 39,157.88/x
  3. Step 3: Cross multiply
    61,795.40x = 85,309.26 × 39,157.88
  4. Step 4: Simplify right side
    61,795.40x = 3,340,529,765.97
  5. Step 5: Solve for x
    x = 3,340,529,765.97/61,795.40
  6. Step 6: Final answer
    x = 54,057.90

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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.