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Finding the Fourth Proportional to 128,365.80, 192,581.60 and 53,461.04

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Solution

The fourth proportional to 128,365.80, 192,581.60 and 53,461.04 is: 80,205.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,365.80 : 192,581.60 = 53,461.04 : x
  2. Step 2: Convert to fraction form
    128,365.80/192,581.60 = 53,461.04/x
  3. Step 3: Cross multiply
    128,365.80x = 192,581.60 × 53,461.04
  4. Step 4: Simplify right side
    128,365.80x = 10,295,612,620.86
  5. Step 5: Solve for x
    x = 10,295,612,620.86/128,365.80
  6. Step 6: Final answer
    x = 80,205.26

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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.