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Finding the Fourth Proportional to 70,090.61, 96,721.67 and 39,873.09

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Solution

The fourth proportional to 70,090.61, 96,721.67 and 39,873.09 is: 55,022.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,090.61 : 96,721.67 = 39,873.09 : x
  2. Step 2: Convert to fraction form
    70,090.61/96,721.67 = 39,873.09/x
  3. Step 3: Cross multiply
    70,090.61x = 96,721.67 × 39,873.09
  4. Step 4: Simplify right side
    70,090.61x = 3,856,591,653.49
  5. Step 5: Solve for x
    x = 3,856,591,653.49/70,090.61
  6. Step 6: Final answer
    x = 55,022.94

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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.