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Finding the Fourth Proportional to 326,195.79, 489,176.31 and 112,905.78

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Solution

The fourth proportional to 326,195.79, 489,176.31 and 112,905.78 is: 169,318.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,195.79 : 489,176.31 = 112,905.78 : x
  2. Step 2: Convert to fraction form
    326,195.79/489,176.31 = 112,905.78/x
  3. Step 3: Cross multiply
    326,195.79x = 489,176.31 × 112,905.78
  4. Step 4: Simplify right side
    326,195.79x = 55,230,832,838.07
  5. Step 5: Solve for x
    x = 55,230,832,838.07/326,195.79
  6. Step 6: Final answer
    x = 169,318.04

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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.