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Finding the Fourth Proportional to 223,491.72, 335,150.10 and 139,128.60

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Solution

The fourth proportional to 223,491.72, 335,150.10 and 139,128.60 is: 208,638.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,491.72 : 335,150.10 = 139,128.60 : x
  2. Step 2: Convert to fraction form
    223,491.72/335,150.10 = 139,128.60/x
  3. Step 3: Cross multiply
    223,491.72x = 335,150.10 × 139,128.60
  4. Step 4: Simplify right side
    223,491.72x = 46,628,964,202.86
  5. Step 5: Solve for x
    x = 46,628,964,202.86/223,491.72
  6. Step 6: Final answer
    x = 208,638.44

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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.