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Finding the Fourth Proportional to 71,805.40, 99,090.06 and 39,974.92

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Solution

The fourth proportional to 71,805.40, 99,090.06 and 39,974.92 is: 55,164.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,805.40 : 99,090.06 = 39,974.92 : x
  2. Step 2: Convert to fraction form
    71,805.40/99,090.06 = 39,974.92/x
  3. Step 3: Cross multiply
    71,805.40x = 99,090.06 × 39,974.92
  4. Step 4: Simplify right side
    71,805.40x = 3,961,117,221.30
  5. Step 5: Solve for x
    x = 3,961,117,221.30/71,805.40
  6. Step 6: Final answer
    x = 55,164.61

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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.