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Finding the Fourth Proportional to 120,090.10, 165,747.18 and 79,182.28

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Solution

The fourth proportional to 120,090.10, 165,747.18 and 79,182.28 is: 109,286.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,090.10 : 165,747.18 = 79,182.28 : x
  2. Step 2: Convert to fraction form
    120,090.10/165,747.18 = 79,182.28/x
  3. Step 3: Cross multiply
    120,090.10x = 165,747.18 × 79,182.28
  4. Step 4: Simplify right side
    120,090.10x = 13,124,239,615.97
  5. Step 5: Solve for x
    x = 13,124,239,615.97/120,090.10
  6. Step 6: Final answer
    x = 109,286.61

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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.