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Finding the Fourth Proportional to 211,797.36, 317,744.64 and 87,138.36

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Solution

The fourth proportional to 211,797.36, 317,744.64 and 87,138.36 is: 130,727.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,797.36 : 317,744.64 = 87,138.36 : x
  2. Step 2: Convert to fraction form
    211,797.36/317,744.64 = 87,138.36/x
  3. Step 3: Cross multiply
    211,797.36x = 317,744.64 × 87,138.36
  4. Step 4: Simplify right side
    211,797.36x = 27,687,746,828.39
  5. Step 5: Solve for x
    x = 27,687,746,828.39/211,797.36
  6. Step 6: Final answer
    x = 130,727.54

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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.