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Finding the Fourth Proportional to 135,876.69, 203,618.19 and 76,586.20

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Solution

The fourth proportional to 135,876.69, 203,618.19 and 76,586.20 is: 114,768.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,876.69 : 203,618.19 = 76,586.20 : x
  2. Step 2: Convert to fraction form
    135,876.69/203,618.19 = 76,586.20/x
  3. Step 3: Cross multiply
    135,876.69x = 203,618.19 × 76,586.20
  4. Step 4: Simplify right side
    135,876.69x = 15,594,343,422.98
  5. Step 5: Solve for x
    x = 15,594,343,422.98/135,876.69
  6. Step 6: Final answer
    x = 114,768.35

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1.5x scale

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.