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Finding the Fourth Proportional to 219,621.52, 303,110.20 and 139,056.52

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Solution

The fourth proportional to 219,621.52, 303,110.20 and 139,056.52 is: 191,918.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,621.52 : 303,110.20 = 139,056.52 : x
  2. Step 2: Convert to fraction form
    219,621.52/303,110.20 = 139,056.52/x
  3. Step 3: Cross multiply
    219,621.52x = 303,110.20 × 139,056.52
  4. Step 4: Simplify right side
    219,621.52x = 42,149,449,588.50
  5. Step 5: Solve for x
    x = 42,149,449,588.50/219,621.52
  6. Step 6: Final answer
    x = 191,918.58

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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.