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Finding the Fourth Proportional to 61,684.92, 85,040.50 and 39,012.60

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Solution

The fourth proportional to 61,684.92, 85,040.50 and 39,012.60 is: 53,783.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,684.92 : 85,040.50 = 39,012.60 : x
  2. Step 2: Convert to fraction form
    61,684.92/85,040.50 = 39,012.60/x
  3. Step 3: Cross multiply
    61,684.92x = 85,040.50 × 39,012.60
  4. Step 4: Simplify right side
    61,684.92x = 3,317,651,010.30
  5. Step 5: Solve for x
    x = 3,317,651,010.30/61,684.92
  6. Step 6: Final answer
    x = 53,783.83

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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.