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Finding the Fourth Proportional to 139,236.91, 208,821.88 and 64,285.04

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Solution

The fourth proportional to 139,236.91, 208,821.88 and 64,285.04 is: 96,412.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,236.91 : 208,821.88 = 64,285.04 : x
  2. Step 2: Convert to fraction form
    139,236.91/208,821.88 = 64,285.04/x
  3. Step 3: Cross multiply
    139,236.91x = 208,821.88 × 64,285.04
  4. Step 4: Simplify right side
    139,236.91x = 13,424,123,511.09
  5. Step 5: Solve for x
    x = 13,424,123,511.09/139,236.91
  6. Step 6: Final answer
    x = 96,412.11

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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.