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Finding the Fourth Proportional to 71,581.87, 98,782.44 and 39,750.88

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Solution

The fourth proportional to 71,581.87, 98,782.44 and 39,750.88 is: 54,855.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,581.87 : 98,782.44 = 39,750.88 : x
  2. Step 2: Convert to fraction form
    71,581.87/98,782.44 = 39,750.88/x
  3. Step 3: Cross multiply
    71,581.87x = 98,782.44 × 39,750.88
  4. Step 4: Simplify right side
    71,581.87x = 3,926,688,918.55
  5. Step 5: Solve for x
    x = 3,926,688,918.55/71,581.87
  6. Step 6: Final answer
    x = 54,855.91

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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.