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Finding the Fourth Proportional to 139,247.64, 208,872.59 and 39,411.09

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Solution

The fourth proportional to 139,247.64, 208,872.59 and 39,411.09 is: 59,116.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,247.64 : 208,872.59 = 39,411.09 : x
  2. Step 2: Convert to fraction form
    139,247.64/208,872.59 = 39,411.09/x
  3. Step 3: Cross multiply
    139,247.64x = 208,872.59 × 39,411.09
  4. Step 4: Simplify right side
    139,247.64x = 8,231,896,245.97
  5. Step 5: Solve for x
    x = 8,231,896,245.97/139,247.64
  6. Step 6: Final answer
    x = 59,116.95

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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.