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Finding the Fourth Proportional to 250,667.84, 345,919.74 and 137,489.78

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Solution

The fourth proportional to 250,667.84, 345,919.74 and 137,489.78 is: 189,734.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,667.84 : 345,919.74 = 137,489.78 : x
  2. Step 2: Convert to fraction form
    250,667.84/345,919.74 = 137,489.78/x
  3. Step 3: Cross multiply
    250,667.84x = 345,919.74 × 137,489.78
  4. Step 4: Simplify right side
    250,667.84x = 47,560,428,950.26
  5. Step 5: Solve for x
    x = 47,560,428,950.26/250,667.84
  6. Step 6: Final answer
    x = 189,734.87

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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.