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Finding the Fourth Proportional to 336,737.20, 505,105.80 and 87,419.20

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Solution

The fourth proportional to 336,737.20, 505,105.80 and 87,419.20 is: 131,128.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    336,737.20 : 505,105.80 = 87,419.20 : x
  2. Step 2: Convert to fraction form
    336,737.20/505,105.80 = 87,419.20/x
  3. Step 3: Cross multiply
    336,737.20x = 505,105.80 × 87,419.20
  4. Step 4: Simplify right side
    336,737.20x = 44,155,944,951.36
  5. Step 5: Solve for x
    x = 44,155,944,951.36/336,737.20
  6. Step 6: Final answer
    x = 131,128.80

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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.