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Finding the Fourth Proportional to 84,659.99, 126,973.58 and 80,445.15

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Solution

The fourth proportional to 84,659.99, 126,973.58 and 80,445.15 is: 120,652.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,659.99 : 126,973.58 = 80,445.15 : x
  2. Step 2: Convert to fraction form
    84,659.99/126,973.58 = 80,445.15/x
  3. Step 3: Cross multiply
    84,659.99x = 126,973.58 × 80,445.15
  4. Step 4: Simplify right side
    84,659.99x = 10,214,408,286.91
  5. Step 5: Solve for x
    x = 10,214,408,286.91/84,659.99
  6. Step 6: Final answer
    x = 120,652.14

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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.