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Finding the Fourth Proportional to 71,728.70, 98,917.64 and 45,895.44

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Solution

The fourth proportional to 71,728.70, 98,917.64 and 45,895.44 is: 63,292.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,728.70 : 98,917.64 = 45,895.44 : x
  2. Step 2: Convert to fraction form
    71,728.70/98,917.64 = 45,895.44/x
  3. Step 3: Cross multiply
    71,728.70x = 98,917.64 × 45,895.44
  4. Step 4: Simplify right side
    71,728.70x = 4,539,868,611.56
  5. Step 5: Solve for x
    x = 4,539,868,611.56/71,728.70
  6. Step 6: Final answer
    x = 63,292.22

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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.