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Finding the Fourth Proportional to 128,568.60, 192,823.20 and 48,615.12

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Solution

The fourth proportional to 128,568.60, 192,823.20 and 48,615.12 is: 72,911.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,568.60 : 192,823.20 = 48,615.12 : x
  2. Step 2: Convert to fraction form
    128,568.60/192,823.20 = 48,615.12/x
  3. Step 3: Cross multiply
    128,568.60x = 192,823.20 × 48,615.12
  4. Step 4: Simplify right side
    128,568.60x = 9,374,123,006.78
  5. Step 5: Solve for x
    x = 9,374,123,006.78/128,568.60
  6. Step 6: Final answer
    x = 72,911.45

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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.