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Finding the Fourth Proportional to 254,138.50, 381,207.75 and 87,926.50

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Solution

The fourth proportional to 254,138.50, 381,207.75 and 87,926.50 is: 131,889.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,138.50 : 381,207.75 = 87,926.50 : x
  2. Step 2: Convert to fraction form
    254,138.50/381,207.75 = 87,926.50/x
  3. Step 3: Cross multiply
    254,138.50x = 381,207.75 × 87,926.50
  4. Step 4: Simplify right side
    254,138.50x = 33,518,263,230.38
  5. Step 5: Solve for x
    x = 33,518,263,230.38/254,138.50
  6. Step 6: Final answer
    x = 131,889.75

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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.