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Finding the Fourth Proportional to 235,487.78, 324,858.87 and 139,926.81

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Solution

The fourth proportional to 235,487.78, 324,858.87 and 139,926.81 is: 193,031.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,487.78 : 324,858.87 = 139,926.81 : x
  2. Step 2: Convert to fraction form
    235,487.78/324,858.87 = 139,926.81/x
  3. Step 3: Cross multiply
    235,487.78x = 324,858.87 × 139,926.81
  4. Step 4: Simplify right side
    235,487.78x = 45,456,465,379.30
  5. Step 5: Solve for x
    x = 45,456,465,379.30/235,487.78
  6. Step 6: Final answer
    x = 193,031.10

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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.