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Finding the Fourth Proportional to 71,651.72, 98,890.30 and 51,575.08

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Solution

The fourth proportional to 71,651.72, 98,890.30 and 51,575.08 is: 71,181.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,651.72 : 98,890.30 = 51,575.08 : x
  2. Step 2: Convert to fraction form
    71,651.72/98,890.30 = 51,575.08/x
  3. Step 3: Cross multiply
    71,651.72x = 98,890.30 × 51,575.08
  4. Step 4: Simplify right side
    71,651.72x = 5,100,275,133.72
  5. Step 5: Solve for x
    x = 5,100,275,133.72/71,651.72
  6. Step 6: Final answer
    x = 71,181.48

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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.