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Finding the Fourth Proportional to 135,672.13, 187,215 and 75,241.66

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Solution

The fourth proportional to 135,672.13, 187,215 and 75,241.66 is: 103,826.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,672.13 : 187,215 = 75,241.66 : x
  2. Step 2: Convert to fraction form
    135,672.13/187,215 = 75,241.66/x
  3. Step 3: Cross multiply
    135,672.13x = 187,215 × 75,241.66
  4. Step 4: Simplify right side
    135,672.13x = 14,086,367,376.90
  5. Step 5: Solve for x
    x = 14,086,367,376.90/135,672.13
  6. Step 6: Final answer
    x = 103,826.54

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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.