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Finding the Fourth Proportional to 207,718.59, 311,630.37 and 57,958.78

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Solution

The fourth proportional to 207,718.59, 311,630.37 and 57,958.78 is: 86,952.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,718.59 : 311,630.37 = 57,958.78 : x
  2. Step 2: Convert to fraction form
    207,718.59/311,630.37 = 57,958.78/x
  3. Step 3: Cross multiply
    207,718.59x = 311,630.37 × 57,958.78
  4. Step 4: Simplify right side
    207,718.59x = 18,061,716,056.15
  5. Step 5: Solve for x
    x = 18,061,716,056.15/207,718.59
  6. Step 6: Final answer
    x = 86,952.81

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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.