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Finding the Fourth Proportional to 79,808.63, 119,712.95 and 27,218.57

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Solution

The fourth proportional to 79,808.63, 119,712.95 and 27,218.57 is: 40,827.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,808.63 : 119,712.95 = 27,218.57 : x
  2. Step 2: Convert to fraction form
    79,808.63/119,712.95 = 27,218.57/x
  3. Step 3: Cross multiply
    79,808.63x = 119,712.95 × 27,218.57
  4. Step 4: Simplify right side
    79,808.63x = 3,258,415,173.39
  5. Step 5: Solve for x
    x = 3,258,415,173.39/79,808.63
  6. Step 6: Final answer
    x = 40,827.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.