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Finding the Fourth Proportional to 71,672.91, 98,908.73 and 39,841.53

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Solution

The fourth proportional to 71,672.91, 98,908.73 and 39,841.53 is: 54,981.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,672.91 : 98,908.73 = 39,841.53 : x
  2. Step 2: Convert to fraction form
    71,672.91/98,908.73 = 39,841.53/x
  3. Step 3: Cross multiply
    71,672.91x = 98,908.73 × 39,841.53
  4. Step 4: Simplify right side
    71,672.91x = 3,940,675,133.56
  5. Step 5: Solve for x
    x = 3,940,675,133.56/71,672.91
  6. Step 6: Final answer
    x = 54,981.37

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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.