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Finding the Fourth Proportional to 326,076.40, 489,114.60 and 89,418.70

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Solution

The fourth proportional to 326,076.40, 489,114.60 and 89,418.70 is: 134,128.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,076.40 : 489,114.60 = 89,418.70 : x
  2. Step 2: Convert to fraction form
    326,076.40/489,114.60 = 89,418.70/x
  3. Step 3: Cross multiply
    326,076.40x = 489,114.60 × 89,418.70
  4. Step 4: Simplify right side
    326,076.40x = 43,735,991,683.02
  5. Step 5: Solve for x
    x = 43,735,991,683.02/326,076.40
  6. Step 6: Final answer
    x = 134,128.05

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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.