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Finding the Fourth Proportional to 257,247.31, 385,914.36 and 88,722.56

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Solution

The fourth proportional to 257,247.31, 385,914.36 and 88,722.56 is: 133,098.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,247.31 : 385,914.36 = 88,722.56 : x
  2. Step 2: Convert to fraction form
    257,247.31/385,914.36 = 88,722.56/x
  3. Step 3: Cross multiply
    257,247.31x = 385,914.36 × 88,722.56
  4. Step 4: Simplify right side
    257,247.31x = 34,239,308,030.39
  5. Step 5: Solve for x
    x = 34,239,308,030.39/257,247.31
  6. Step 6: Final answer
    x = 133,098.80

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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.