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Finding the Fourth Proportional to 71,683.64, 98,917.82 and 39,850.60

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Solution

The fourth proportional to 71,683.64, 98,917.82 and 39,850.60 is: 54,990.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,683.64 : 98,917.82 = 39,850.60 : x
  2. Step 2: Convert to fraction form
    71,683.64/98,917.82 = 39,850.60/x
  3. Step 3: Cross multiply
    71,683.64x = 98,917.82 × 39,850.60
  4. Step 4: Simplify right side
    71,683.64x = 3,941,934,477.69
  5. Step 5: Solve for x
    x = 3,941,934,477.69/71,683.64
  6. Step 6: Final answer
    x = 54,990.71

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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.