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Finding the Fourth Proportional to 71,610.60, 98,817.60 and 39,777.60

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Solution

The fourth proportional to 71,610.60, 98,817.60 and 39,777.60 is: 54,890.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,610.60 : 98,817.60 = 39,777.60 : x
  2. Step 2: Convert to fraction form
    71,610.60/98,817.60 = 39,777.60/x
  3. Step 3: Cross multiply
    71,610.60x = 98,817.60 × 39,777.60
  4. Step 4: Simplify right side
    71,610.60x = 3,930,726,965.76
  5. Step 5: Solve for x
    x = 3,930,726,965.76/71,610.60
  6. Step 6: Final answer
    x = 54,890.30

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1.5x scale

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.