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Finding the Fourth Proportional to 223,128.78, 307,914.56 and 126,330.12

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Solution

The fourth proportional to 223,128.78, 307,914.56 and 126,330.12 is: 174,333.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,128.78 : 307,914.56 = 126,330.12 : x
  2. Step 2: Convert to fraction form
    223,128.78/307,914.56 = 126,330.12/x
  3. Step 3: Cross multiply
    223,128.78x = 307,914.56 × 126,330.12
  4. Step 4: Simplify right side
    223,128.78x = 38,898,883,314.55
  5. Step 5: Solve for x
    x = 38,898,883,314.55/223,128.78
  6. Step 6: Final answer
    x = 174,333.78

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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.