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Finding the Fourth Proportional to 242,080.80, 363,121.20 and 84,256.80

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Solution

The fourth proportional to 242,080.80, 363,121.20 and 84,256.80 is: 126,385.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,080.80 : 363,121.20 = 84,256.80 : x
  2. Step 2: Convert to fraction form
    242,080.80/363,121.20 = 84,256.80/x
  3. Step 3: Cross multiply
    242,080.80x = 363,121.20 × 84,256.80
  4. Step 4: Simplify right side
    242,080.80x = 30,595,430,324.16
  5. Step 5: Solve for x
    x = 30,595,430,324.16/242,080.80
  6. Step 6: Final answer
    x = 126,385.20

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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.