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Finding the Fourth Proportional to 139,786.84, 209,650.86 and 45,025.51

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Solution

The fourth proportional to 139,786.84, 209,650.86 and 45,025.51 is: 67,528.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,786.84 : 209,650.86 = 45,025.51 : x
  2. Step 2: Convert to fraction form
    139,786.84/209,650.86 = 45,025.51/x
  3. Step 3: Cross multiply
    139,786.84x = 209,650.86 × 45,025.51
  4. Step 4: Simplify right side
    139,786.84x = 9,439,636,893.44
  5. Step 5: Solve for x
    x = 9,439,636,893.44/139,786.84
  6. Step 6: Final answer
    x = 67,528.80

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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.