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Finding the Fourth Proportional to 135,679.78, 187,215.67 and 75,240.82

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Solution

The fourth proportional to 135,679.78, 187,215.67 and 75,240.82 is: 103,819.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,679.78 : 187,215.67 = 75,240.82 : x
  2. Step 2: Convert to fraction form
    135,679.78/187,215.67 = 75,240.82/x
  3. Step 3: Cross multiply
    135,679.78x = 187,215.67 × 75,240.82
  4. Step 4: Simplify right side
    135,679.78x = 14,086,260,527.65
  5. Step 5: Solve for x
    x = 14,086,260,527.65/135,679.78
  6. Step 6: Final answer
    x = 103,819.90

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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.