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Finding the Fourth Proportional to 71,672.20, 98,911.01 and 39,841.63

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Solution

The fourth proportional to 71,672.20, 98,911.01 and 39,841.63 is: 54,983.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,672.20 : 98,911.01 = 39,841.63 : x
  2. Step 2: Convert to fraction form
    71,672.20/98,911.01 = 39,841.63/x
  3. Step 3: Cross multiply
    71,672.20x = 98,911.01 × 39,841.63
  4. Step 4: Simplify right side
    71,672.20x = 3,940,775,863.35
  5. Step 5: Solve for x
    x = 3,940,775,863.35/71,672.20
  6. Step 6: Final answer
    x = 54,983.32

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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.