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Finding the Fourth Proportional to 79,855.73, 110,145.65 and 64,749.03

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Solution

The fourth proportional to 79,855.73, 110,145.65 and 64,749.03 is: 89,308.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,855.73 : 110,145.65 = 64,749.03 : x
  2. Step 2: Convert to fraction form
    79,855.73/110,145.65 = 64,749.03/x
  3. Step 3: Cross multiply
    79,855.73x = 110,145.65 × 64,749.03
  4. Step 4: Simplify right side
    79,855.73x = 7,131,823,672.47
  5. Step 5: Solve for x
    x = 7,131,823,672.47/79,855.73
  6. Step 6: Final answer
    x = 89,308.86

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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.