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Finding the Fourth Proportional to 230,894.33, 318,631.10 and 128,921.49

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Solution

The fourth proportional to 230,894.33, 318,631.10 and 128,921.49 is: 177,909.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,894.33 : 318,631.10 = 128,921.49 : x
  2. Step 2: Convert to fraction form
    230,894.33/318,631.10 = 128,921.49/x
  3. Step 3: Cross multiply
    230,894.33x = 318,631.10 × 128,921.49
  4. Step 4: Simplify right side
    230,894.33x = 41,078,395,527.73
  5. Step 5: Solve for x
    x = 41,078,395,527.73/230,894.33
  6. Step 6: Final answer
    x = 177,909.94

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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.