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Finding the Fourth Proportional to 230,929.66, 318,654.81 and 128,960.79

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Solution

The fourth proportional to 230,929.66, 318,654.81 and 128,960.79 is: 177,950.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,929.66 : 318,654.81 = 128,960.79 : x
  2. Step 2: Convert to fraction form
    230,929.66/318,654.81 = 128,960.79/x
  3. Step 3: Cross multiply
    230,929.66x = 318,654.81 × 128,960.79
  4. Step 4: Simplify right side
    230,929.66x = 41,093,976,034.90
  5. Step 5: Solve for x
    x = 41,093,976,034.90/230,929.66
  6. Step 6: Final answer
    x = 177,950.19

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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.