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Finding the Fourth Proportional to 326,064.60, 489,096.90 and 89,431.20

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Solution

The fourth proportional to 326,064.60, 489,096.90 and 89,431.20 is: 134,146.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,064.60 : 489,096.90 = 89,431.20 : x
  2. Step 2: Convert to fraction form
    326,064.60/489,096.90 = 89,431.20/x
  3. Step 3: Cross multiply
    326,064.60x = 489,096.90 × 89,431.20
  4. Step 4: Simplify right side
    326,064.60x = 43,740,522,683.28
  5. Step 5: Solve for x
    x = 43,740,522,683.28/326,064.60
  6. Step 6: Final answer
    x = 134,146.80

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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.