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Finding the Fourth Proportional to 219,893.67, 303,309.72 and 139,237.11

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Solution

The fourth proportional to 219,893.67, 303,309.72 and 139,237.11 is: 192,056.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,893.67 : 303,309.72 = 139,237.11 : x
  2. Step 2: Convert to fraction form
    219,893.67/303,309.72 = 139,237.11/x
  3. Step 3: Cross multiply
    219,893.67x = 303,309.72 × 139,237.11
  4. Step 4: Simplify right side
    219,893.67x = 42,231,968,847.71
  5. Step 5: Solve for x
    x = 42,231,968,847.71/219,893.67
  6. Step 6: Final answer
    x = 192,056.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.