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Finding the Fourth Proportional to 113,449.61, 156,608.87 and 80,765.09

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Solution

The fourth proportional to 113,449.61, 156,608.87 and 80,765.09 is: 111,490.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,449.61 : 156,608.87 = 80,765.09 : x
  2. Step 2: Convert to fraction form
    113,449.61/156,608.87 = 80,765.09/x
  3. Step 3: Cross multiply
    113,449.61x = 156,608.87 × 80,765.09
  4. Step 4: Simplify right side
    113,449.61x = 12,648,529,468.05
  5. Step 5: Solve for x
    x = 12,648,529,468.05/113,449.61
  6. Step 6: Final answer
    x = 111,490.29

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1.5x scale

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.