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Finding the Fourth Proportional to 79,808.78, 119,009.11 and 75,884.48

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Solution

The fourth proportional to 79,808.78, 119,009.11 and 75,884.48 is: 113,157.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,808.78 : 119,009.11 = 75,884.48 : x
  2. Step 2: Convert to fraction form
    79,808.78/119,009.11 = 75,884.48/x
  3. Step 3: Cross multiply
    79,808.78x = 119,009.11 × 75,884.48
  4. Step 4: Simplify right side
    79,808.78x = 9,030,944,427.61
  5. Step 5: Solve for x
    x = 9,030,944,427.61/79,808.78
  6. Step 6: Final answer
    x = 113,157.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.