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Finding the Fourth Proportional to 223,138.80, 308,051.64 and 172,039.41

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Solution

The fourth proportional to 223,138.80, 308,051.64 and 172,039.41 is: 237,506.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,138.80 : 308,051.64 = 172,039.41 : x
  2. Step 2: Convert to fraction form
    223,138.80/308,051.64 = 172,039.41/x
  3. Step 3: Cross multiply
    223,138.80x = 308,051.64 × 172,039.41
  4. Step 4: Simplify right side
    223,138.80x = 52,997,022,395.13
  5. Step 5: Solve for x
    x = 52,997,022,395.13/223,138.80
  6. Step 6: Final answer
    x = 237,506.98

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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.