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Finding the Fourth Proportional to 70,227.88, 96,890.74 and 39,991.76

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Solution

The fourth proportional to 70,227.88, 96,890.74 and 39,991.76 is: 55,175.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,227.88 : 96,890.74 = 39,991.76 : x
  2. Step 2: Convert to fraction form
    70,227.88/96,890.74 = 39,991.76/x
  3. Step 3: Cross multiply
    70,227.88x = 96,890.74 × 39,991.76
  4. Step 4: Simplify right side
    70,227.88x = 3,874,831,656.70
  5. Step 5: Solve for x
    x = 3,874,831,656.70/70,227.88
  6. Step 6: Final answer
    x = 55,175.12

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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.