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Finding the Fourth Proportional to 326,172.27, 489,291.87 and 112,939.88

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Solution

The fourth proportional to 326,172.27, 489,291.87 and 112,939.88 is: 169,421.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,172.27 : 489,291.87 = 112,939.88 : x
  2. Step 2: Convert to fraction form
    326,172.27/489,291.87 = 112,939.88/x
  3. Step 3: Cross multiply
    326,172.27x = 489,291.87 × 112,939.88
  4. Step 4: Simplify right side
    326,172.27x = 55,260,563,059.84
  5. Step 5: Solve for x
    x = 55,260,563,059.84/326,172.27
  6. Step 6: Final answer
    x = 169,421.40

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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.