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Finding the Fourth Proportional to 139,247.79, 208,882.71 and 39,408.60

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Solution

The fourth proportional to 139,247.79, 208,882.71 and 39,408.60 is: 59,116.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,247.79 : 208,882.71 = 39,408.60 : x
  2. Step 2: Convert to fraction form
    139,247.79/208,882.71 = 39,408.60/x
  3. Step 3: Cross multiply
    139,247.79x = 208,882.71 × 39,408.60
  4. Step 4: Simplify right side
    139,247.79x = 8,231,775,165.31
  5. Step 5: Solve for x
    x = 8,231,775,165.31/139,247.79
  6. Step 6: Final answer
    x = 59,116.02

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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.