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Finding the Fourth Proportional to 71,658.44, 98,662.78 and 65,015.44

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Solution

The fourth proportional to 71,658.44, 98,662.78 and 65,015.44 is: 89,516.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,658.44 : 98,662.78 = 65,015.44 : x
  2. Step 2: Convert to fraction form
    71,658.44/98,662.78 = 65,015.44/x
  3. Step 3: Cross multiply
    71,658.44x = 98,662.78 × 65,015.44
  4. Step 4: Simplify right side
    71,658.44x = 6,414,604,053.32
  5. Step 5: Solve for x
    x = 6,414,604,053.32/71,658.44
  6. Step 6: Final answer
    x = 89,516.38

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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.