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Finding the Fourth Proportional to 139,418.64, 209,096.60 and 39,576.68

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Solution

The fourth proportional to 139,418.64, 209,096.60 and 39,576.68 is: 59,356.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,418.64 : 209,096.60 = 39,576.68 : x
  2. Step 2: Convert to fraction form
    139,418.64/209,096.60 = 39,576.68/x
  3. Step 3: Cross multiply
    139,418.64x = 209,096.60 × 39,576.68
  4. Step 4: Simplify right side
    139,418.64x = 8,275,349,227.29
  5. Step 5: Solve for x
    x = 8,275,349,227.29/139,418.64
  6. Step 6: Final answer
    x = 59,356.12

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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.