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Finding the Fourth Proportional to 326,121.60, 489,036.60 and 126,375.60

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Solution

The fourth proportional to 326,121.60, 489,036.60 and 126,375.60 is: 189,506.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,121.60 : 489,036.60 = 126,375.60 : x
  2. Step 2: Convert to fraction form
    326,121.60/489,036.60 = 126,375.60/x
  3. Step 3: Cross multiply
    326,121.60x = 489,036.60 × 126,375.60
  4. Step 4: Simplify right side
    326,121.60x = 61,802,293,746.96
  5. Step 5: Solve for x
    x = 61,802,293,746.96/326,121.60
  6. Step 6: Final answer
    x = 189,506.90

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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.